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Commit | Line | Data |
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a7334b09 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
a7334b09 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
87f0e418 | 20 | #include <errno.h> |
0301abf4 | 21 | #include <stdlib.h> |
4f5dd394 | 22 | #include <string.h> |
45fb0699 | 23 | #include <sys/stat.h> |
4f5dd394 | 24 | #include <unistd.h> |
87f0e418 | 25 | |
718db961 LP |
26 | #include "sd-id128.h" |
27 | #include "sd-messages.h" | |
4f5dd394 | 28 | |
b5efdb8a | 29 | #include "alloc-util.h" |
4f5dd394 LP |
30 | #include "bus-common-errors.h" |
31 | #include "bus-util.h" | |
c6c18be3 | 32 | #include "cgroup-util.h" |
4f5dd394 LP |
33 | #include "dbus-unit.h" |
34 | #include "dbus.h" | |
35 | #include "dropin.h" | |
36 | #include "escape.h" | |
37 | #include "execute.h" | |
a5c32cff | 38 | #include "fileio-label.h" |
6482f626 | 39 | #include "formats-util.h" |
4f5dd394 LP |
40 | #include "load-dropin.h" |
41 | #include "load-fragment.h" | |
42 | #include "log.h" | |
43 | #include "macro.h" | |
44 | #include "missing.h" | |
45 | #include "mkdir.h" | |
6bedfcbb | 46 | #include "parse-util.h" |
4f5dd394 | 47 | #include "path-util.h" |
0b452006 | 48 | #include "process-util.h" |
4f5dd394 | 49 | #include "set.h" |
6eb7c172 | 50 | #include "signal-util.h" |
e9db43d5 | 51 | #include "special.h" |
8fcde012 | 52 | #include "stat-util.h" |
d054f0a4 | 53 | #include "stdio-util.h" |
07630cea | 54 | #include "string-util.h" |
4f5dd394 | 55 | #include "strv.h" |
4f4afc88 | 56 | #include "umask-util.h" |
4f5dd394 | 57 | #include "unit-name.h" |
e9db43d5 | 58 | #include "unit.h" |
b1d4f8e1 LP |
59 | #include "user-util.h" |
60 | #include "virt.h" | |
87f0e418 LP |
61 | |
62 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
63 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 64 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 65 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 LP |
66 | [UNIT_TARGET] = &target_vtable, |
67 | [UNIT_DEVICE] = &device_vtable, | |
68 | [UNIT_MOUNT] = &mount_vtable, | |
69 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 70 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 71 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 72 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
73 | [UNIT_SLICE] = &slice_vtable, |
74 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
75 | }; |
76 | ||
f2341e0a | 77 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 78 | |
7d17cfbc | 79 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
80 | Unit *u; |
81 | ||
82 | assert(m); | |
ac155bb8 | 83 | assert(size >= sizeof(Unit)); |
87f0e418 | 84 | |
7d17cfbc MS |
85 | u = malloc0(size); |
86 | if (!u) | |
87f0e418 LP |
87 | return NULL; |
88 | ||
d5099efc | 89 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 90 | if (!u->names) { |
87f0e418 LP |
91 | free(u); |
92 | return NULL; | |
93 | } | |
94 | ||
ac155bb8 MS |
95 | u->manager = m; |
96 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
97 | u->default_dependencies = true; |
98 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 99 | u->unit_file_preset = -1; |
d420282b | 100 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 101 | u->cgroup_inotify_wd = -1; |
36c16a7c | 102 | u->job_timeout = USEC_INFINITY; |
00d9ef85 LP |
103 | u->ref_uid = UID_INVALID; |
104 | u->ref_gid = GID_INVALID; | |
fe700f46 | 105 | u->cpu_usage_last = NSEC_INFINITY; |
87f0e418 | 106 | |
6bf0f408 | 107 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 108 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 109 | |
87f0e418 LP |
110 | return u; |
111 | } | |
112 | ||
f278026d LP |
113 | bool unit_has_name(Unit *u, const char *name) { |
114 | assert(u); | |
115 | assert(name); | |
116 | ||
390bc2b1 | 117 | return set_contains(u->names, (char*) name); |
f278026d LP |
118 | } |
119 | ||
598459ce LP |
120 | static void unit_init(Unit *u) { |
121 | CGroupContext *cc; | |
122 | ExecContext *ec; | |
123 | KillContext *kc; | |
124 | ||
125 | assert(u); | |
126 | assert(u->manager); | |
127 | assert(u->type >= 0); | |
128 | ||
129 | cc = unit_get_cgroup_context(u); | |
130 | if (cc) { | |
131 | cgroup_context_init(cc); | |
132 | ||
133 | /* Copy in the manager defaults into the cgroup | |
134 | * context, _before_ the rest of the settings have | |
135 | * been initialized */ | |
136 | ||
137 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 138 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
139 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
140 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 141 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
0af20ea2 LP |
142 | |
143 | if (u->type != UNIT_SLICE) | |
144 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
145 | } |
146 | ||
147 | ec = unit_get_exec_context(u); | |
148 | if (ec) | |
149 | exec_context_init(ec); | |
150 | ||
151 | kc = unit_get_kill_context(u); | |
152 | if (kc) | |
153 | kill_context_init(kc); | |
154 | ||
155 | if (UNIT_VTABLE(u)->init) | |
156 | UNIT_VTABLE(u)->init(u); | |
157 | } | |
158 | ||
87f0e418 | 159 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 160 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 161 | UnitType t; |
87f0e418 LP |
162 | int r; |
163 | ||
164 | assert(u); | |
165 | assert(text); | |
166 | ||
7410616c | 167 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 168 | |
ac155bb8 | 169 | if (!u->instance) |
9e2f7c11 | 170 | return -EINVAL; |
87f0e418 | 171 | |
7410616c LP |
172 | r = unit_name_replace_instance(text, u->instance, &s); |
173 | if (r < 0) | |
174 | return r; | |
175 | } else { | |
9e2f7c11 | 176 | s = strdup(text); |
7410616c LP |
177 | if (!s) |
178 | return -ENOMEM; | |
179 | } | |
87f0e418 | 180 | |
7410616c LP |
181 | if (set_contains(u->names, s)) |
182 | return 0; | |
183 | if (hashmap_contains(u->manager->units, s)) | |
184 | return -EEXIST; | |
185 | ||
186 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 187 | return -EINVAL; |
e537352b | 188 | |
7410616c LP |
189 | t = unit_name_to_type(s); |
190 | if (t < 0) | |
191 | return -EINVAL; | |
87f0e418 | 192 | |
598459ce LP |
193 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
194 | return -EINVAL; | |
87f0e418 | 195 | |
e48614c4 ZJS |
196 | r = unit_name_to_instance(s, &i); |
197 | if (r < 0) | |
598459ce | 198 | return r; |
87f0e418 | 199 | |
ce99c68a | 200 | if (i && !unit_type_may_template(t)) |
598459ce | 201 | return -EINVAL; |
9e2f7c11 | 202 | |
276c3e78 | 203 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
204 | * but not both. Note that we do allow names with different |
205 | * instance names however! */ | |
598459ce LP |
206 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
207 | return -EINVAL; | |
9e2f7c11 | 208 | |
8a993b61 | 209 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 210 | return -EEXIST; |
9e2f7c11 | 211 | |
598459ce LP |
212 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
213 | return -E2BIG; | |
4f0f902f | 214 | |
e48614c4 | 215 | r = set_put(u->names, s); |
7410616c | 216 | if (r < 0) |
598459ce | 217 | return r; |
7410616c | 218 | assert(r > 0); |
87f0e418 | 219 | |
e48614c4 ZJS |
220 | r = hashmap_put(u->manager->units, s, u); |
221 | if (r < 0) { | |
7410616c | 222 | (void) set_remove(u->names, s); |
598459ce | 223 | return r; |
87f0e418 LP |
224 | } |
225 | ||
ac155bb8 | 226 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
227 | u->type = t; |
228 | u->id = s; | |
229 | u->instance = i; | |
9e2f7c11 | 230 | |
71fda00f | 231 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 232 | |
598459ce | 233 | unit_init(u); |
87f0e418 | 234 | |
598459ce LP |
235 | i = NULL; |
236 | } | |
9e2f7c11 | 237 | |
598459ce | 238 | s = NULL; |
9e2f7c11 | 239 | |
598459ce LP |
240 | unit_add_to_dbus_queue(u); |
241 | return 0; | |
87f0e418 LP |
242 | } |
243 | ||
0ae97ec1 | 244 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 245 | _cleanup_free_ char *t = NULL; |
598459ce | 246 | char *s, *i; |
276c3e78 | 247 | int r; |
0ae97ec1 LP |
248 | |
249 | assert(u); | |
250 | assert(name); | |
251 | ||
7410616c | 252 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 253 | |
ac155bb8 | 254 | if (!u->instance) |
9e2f7c11 LP |
255 | return -EINVAL; |
256 | ||
7410616c LP |
257 | r = unit_name_replace_instance(name, u->instance, &t); |
258 | if (r < 0) | |
259 | return r; | |
9e2f7c11 LP |
260 | |
261 | name = t; | |
262 | } | |
263 | ||
0ae97ec1 | 264 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 265 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 266 | if (!s) |
0ae97ec1 LP |
267 | return -ENOENT; |
268 | ||
7410616c | 269 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
270 | r = unit_name_to_instance(s, &i); |
271 | if (r < 0) | |
276c3e78 LP |
272 | return r; |
273 | ||
ac155bb8 | 274 | u->id = s; |
276c3e78 | 275 | |
ac155bb8 MS |
276 | free(u->instance); |
277 | u->instance = i; | |
276c3e78 | 278 | |
c1e1601e | 279 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 280 | |
0ae97ec1 LP |
281 | return 0; |
282 | } | |
283 | ||
f50e0a01 LP |
284 | int unit_set_description(Unit *u, const char *description) { |
285 | char *s; | |
286 | ||
287 | assert(u); | |
288 | ||
8aec412f LP |
289 | if (isempty(description)) |
290 | s = NULL; | |
291 | else { | |
292 | s = strdup(description); | |
293 | if (!s) | |
294 | return -ENOMEM; | |
295 | } | |
f50e0a01 | 296 | |
ac155bb8 MS |
297 | free(u->description); |
298 | u->description = s; | |
c1e1601e LP |
299 | |
300 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
301 | return 0; |
302 | } | |
303 | ||
701cc384 | 304 | bool unit_check_gc(Unit *u) { |
a354329f | 305 | UnitActiveState state; |
701cc384 LP |
306 | assert(u); |
307 | ||
a354329f | 308 | if (u->job) |
701cc384 LP |
309 | return true; |
310 | ||
a354329f | 311 | if (u->nop_job) |
6c073082 LP |
312 | return true; |
313 | ||
a354329f LP |
314 | state = unit_active_state(u); |
315 | ||
316 | /* If the unit is inactive and failed and no job is queued for | |
317 | * it, then release its runtime resources */ | |
318 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
319 | UNIT_VTABLE(u)->release_resources) | |
320 | UNIT_VTABLE(u)->release_resources(u); | |
321 | ||
322 | /* But we keep the unit object around for longer when it is | |
323 | * referenced or configured to not be gc'ed */ | |
324 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
325 | return true; |
326 | ||
a354329f | 327 | if (u->no_gc) |
701cc384 LP |
328 | return true; |
329 | ||
9d576438 LP |
330 | if (u->refs) |
331 | return true; | |
332 | ||
05a98afd LP |
333 | if (sd_bus_track_count(u->bus_track) > 0) |
334 | return true; | |
335 | ||
701cc384 LP |
336 | if (UNIT_VTABLE(u)->check_gc) |
337 | if (UNIT_VTABLE(u)->check_gc(u)) | |
338 | return true; | |
339 | ||
340 | return false; | |
341 | } | |
342 | ||
87f0e418 LP |
343 | void unit_add_to_load_queue(Unit *u) { |
344 | assert(u); | |
ac155bb8 | 345 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 346 | |
ac155bb8 | 347 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
348 | return; |
349 | ||
71fda00f | 350 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 351 | u->in_load_queue = true; |
87f0e418 LP |
352 | } |
353 | ||
23a177ef LP |
354 | void unit_add_to_cleanup_queue(Unit *u) { |
355 | assert(u); | |
356 | ||
ac155bb8 | 357 | if (u->in_cleanup_queue) |
23a177ef LP |
358 | return; |
359 | ||
71fda00f | 360 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 361 | u->in_cleanup_queue = true; |
23a177ef LP |
362 | } |
363 | ||
701cc384 LP |
364 | void unit_add_to_gc_queue(Unit *u) { |
365 | assert(u); | |
366 | ||
ac155bb8 | 367 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
368 | return; |
369 | ||
370 | if (unit_check_gc(u)) | |
371 | return; | |
372 | ||
71fda00f | 373 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 374 | u->in_gc_queue = true; |
701cc384 | 375 | |
313cefa1 | 376 | u->manager->n_in_gc_queue++; |
701cc384 LP |
377 | } |
378 | ||
c1e1601e LP |
379 | void unit_add_to_dbus_queue(Unit *u) { |
380 | assert(u); | |
ac155bb8 | 381 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 382 | |
ac155bb8 | 383 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
384 | return; |
385 | ||
a567261a | 386 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
387 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
388 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 389 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
390 | return; |
391 | } | |
392 | ||
71fda00f | 393 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 394 | u->in_dbus_queue = true; |
c1e1601e LP |
395 | } |
396 | ||
87f0e418 LP |
397 | static void bidi_set_free(Unit *u, Set *s) { |
398 | Iterator i; | |
399 | Unit *other; | |
400 | ||
401 | assert(u); | |
402 | ||
403 | /* Frees the set and makes sure we are dropped from the | |
404 | * inverse pointers */ | |
405 | ||
406 | SET_FOREACH(other, s, i) { | |
407 | UnitDependency d; | |
408 | ||
409 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 410 | set_remove(other->dependencies[d], u); |
701cc384 LP |
411 | |
412 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
413 | } |
414 | ||
415 | set_free(s); | |
416 | } | |
417 | ||
c2756a68 LP |
418 | static void unit_remove_transient(Unit *u) { |
419 | char **i; | |
420 | ||
421 | assert(u); | |
422 | ||
423 | if (!u->transient) | |
424 | return; | |
425 | ||
426 | if (u->fragment_path) | |
3f5e8115 | 427 | (void) unlink(u->fragment_path); |
c2756a68 LP |
428 | |
429 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 430 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 431 | |
39591351 LP |
432 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
433 | if (!p) | |
434 | continue; | |
435 | ||
436 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
437 | if (!pp) | |
438 | continue; | |
439 | ||
440 | /* Only drop transient drop-ins */ | |
441 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
442 | continue; | |
c2756a68 | 443 | |
39591351 LP |
444 | (void) unlink(*i); |
445 | (void) rmdir(p); | |
c2756a68 LP |
446 | } |
447 | } | |
448 | ||
a57f7e2c LP |
449 | static void unit_free_requires_mounts_for(Unit *u) { |
450 | char **j; | |
451 | ||
452 | STRV_FOREACH(j, u->requires_mounts_for) { | |
453 | char s[strlen(*j) + 1]; | |
454 | ||
455 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
456 | char *y; | |
457 | Set *x; | |
458 | ||
459 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
460 | if (!x) | |
461 | continue; | |
462 | ||
463 | set_remove(x, u); | |
464 | ||
465 | if (set_isempty(x)) { | |
466 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
467 | free(y); | |
468 | set_free(x); | |
469 | } | |
470 | } | |
471 | } | |
472 | ||
6796073e | 473 | u->requires_mounts_for = strv_free(u->requires_mounts_for); |
a57f7e2c LP |
474 | } |
475 | ||
598459ce LP |
476 | static void unit_done(Unit *u) { |
477 | ExecContext *ec; | |
478 | CGroupContext *cc; | |
479 | ||
480 | assert(u); | |
481 | ||
482 | if (u->type < 0) | |
483 | return; | |
484 | ||
485 | if (UNIT_VTABLE(u)->done) | |
486 | UNIT_VTABLE(u)->done(u); | |
487 | ||
488 | ec = unit_get_exec_context(u); | |
489 | if (ec) | |
490 | exec_context_done(ec); | |
491 | ||
492 | cc = unit_get_cgroup_context(u); | |
493 | if (cc) | |
494 | cgroup_context_done(cc); | |
495 | } | |
496 | ||
87f0e418 LP |
497 | void unit_free(Unit *u) { |
498 | UnitDependency d; | |
499 | Iterator i; | |
500 | char *t; | |
501 | ||
502 | assert(u); | |
503 | ||
4f4afc88 LP |
504 | if (u->transient_file) |
505 | fclose(u->transient_file); | |
506 | ||
2c289ea8 | 507 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
508 | unit_remove_transient(u); |
509 | ||
c1e1601e LP |
510 | bus_unit_send_removed_signal(u); |
511 | ||
598459ce | 512 | unit_done(u); |
a013b84b | 513 | |
cf9fd508 DM |
514 | sd_bus_slot_unref(u->match_bus_slot); |
515 | ||
05a98afd LP |
516 | sd_bus_track_unref(u->bus_track); |
517 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
518 | ||
a57f7e2c LP |
519 | unit_free_requires_mounts_for(u); |
520 | ||
ac155bb8 MS |
521 | SET_FOREACH(t, u->names, i) |
522 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 523 | |
97e7d748 MS |
524 | if (u->job) { |
525 | Job *j = u->job; | |
526 | job_uninstall(j); | |
527 | job_free(j); | |
528 | } | |
964e0949 | 529 | |
e0209d83 MS |
530 | if (u->nop_job) { |
531 | Job *j = u->nop_job; | |
532 | job_uninstall(j); | |
533 | job_free(j); | |
534 | } | |
535 | ||
964e0949 | 536 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 537 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 538 | |
ac155bb8 | 539 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 540 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 541 | |
ac155bb8 | 542 | if (u->in_load_queue) |
71fda00f | 543 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 544 | |
ac155bb8 | 545 | if (u->in_dbus_queue) |
71fda00f | 546 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 547 | |
ac155bb8 | 548 | if (u->in_cleanup_queue) |
71fda00f | 549 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 550 | |
ac155bb8 | 551 | if (u->in_gc_queue) { |
71fda00f | 552 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 553 | u->manager->n_in_gc_queue--; |
701cc384 LP |
554 | } |
555 | ||
4ad49000 | 556 | if (u->in_cgroup_queue) |
71fda00f | 557 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 558 | |
efdb0237 | 559 | unit_release_cgroup(u); |
72673e86 | 560 | |
00d9ef85 LP |
561 | unit_unref_uid_gid(u, false); |
562 | ||
5269eb6b | 563 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 564 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 565 | |
ac155bb8 | 566 | free(u->description); |
49dbfa7b | 567 | strv_free(u->documentation); |
ac155bb8 | 568 | free(u->fragment_path); |
1b64d026 | 569 | free(u->source_path); |
ae7a7182 | 570 | strv_free(u->dropin_paths); |
ac155bb8 | 571 | free(u->instance); |
87f0e418 | 572 | |
f189ab18 LP |
573 | free(u->job_timeout_reboot_arg); |
574 | ||
ac155bb8 | 575 | set_free_free(u->names); |
87f0e418 | 576 | |
a911bb9a LP |
577 | unit_unwatch_all_pids(u); |
578 | ||
ac155bb8 | 579 | condition_free_list(u->conditions); |
59fccdc5 | 580 | condition_free_list(u->asserts); |
52661efd | 581 | |
6bf0f408 LP |
582 | free(u->reboot_arg); |
583 | ||
702a2d8f LP |
584 | unit_ref_unset(&u->slice); |
585 | ||
ac155bb8 MS |
586 | while (u->refs) |
587 | unit_ref_unset(u->refs); | |
57020a3a | 588 | |
87f0e418 LP |
589 | free(u); |
590 | } | |
591 | ||
592 | UnitActiveState unit_active_state(Unit *u) { | |
593 | assert(u); | |
594 | ||
ac155bb8 | 595 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
596 | return unit_active_state(unit_follow_merge(u)); |
597 | ||
598 | /* After a reload it might happen that a unit is not correctly | |
599 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 600 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
601 | |
602 | return UNIT_VTABLE(u)->active_state(u); | |
603 | } | |
604 | ||
10a94420 LP |
605 | const char* unit_sub_state_to_string(Unit *u) { |
606 | assert(u); | |
607 | ||
608 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
609 | } | |
610 | ||
7c0b05e5 MS |
611 | static int complete_move(Set **s, Set **other) { |
612 | int r; | |
613 | ||
23a177ef LP |
614 | assert(s); |
615 | assert(other); | |
87f0e418 | 616 | |
23a177ef | 617 | if (!*other) |
7c0b05e5 | 618 | return 0; |
87f0e418 | 619 | |
7c0b05e5 MS |
620 | if (*s) { |
621 | r = set_move(*s, *other); | |
622 | if (r < 0) | |
623 | return r; | |
624 | } else { | |
23a177ef LP |
625 | *s = *other; |
626 | *other = NULL; | |
627 | } | |
7c0b05e5 MS |
628 | |
629 | return 0; | |
23a177ef | 630 | } |
87f0e418 | 631 | |
7c0b05e5 | 632 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
633 | char *t; |
634 | Iterator i; | |
7c0b05e5 | 635 | int r; |
87f0e418 | 636 | |
23a177ef LP |
637 | assert(u); |
638 | assert(other); | |
639 | ||
7c0b05e5 MS |
640 | r = complete_move(&u->names, &other->names); |
641 | if (r < 0) | |
642 | return r; | |
23a177ef | 643 | |
ac155bb8 MS |
644 | set_free_free(other->names); |
645 | other->names = NULL; | |
646 | other->id = NULL; | |
23a177ef | 647 | |
ac155bb8 MS |
648 | SET_FOREACH(t, u->names, i) |
649 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
650 | |
651 | return 0; | |
87f0e418 LP |
652 | } |
653 | ||
09a65f92 MS |
654 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
655 | unsigned n_reserve; | |
656 | ||
657 | assert(u); | |
658 | assert(other); | |
659 | assert(d < _UNIT_DEPENDENCY_MAX); | |
660 | ||
661 | /* | |
662 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 663 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
664 | * as a whole to u by complete_move(). |
665 | */ | |
666 | if (!u->dependencies[d]) | |
667 | return 0; | |
668 | ||
669 | /* merge_dependencies() will skip a u-on-u dependency */ | |
670 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
671 | ||
672 | return set_reserve(u->dependencies[d], n_reserve); | |
673 | } | |
674 | ||
d1fab3fe | 675 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
676 | Iterator i; |
677 | Unit *back; | |
87f0e418 | 678 | int r; |
23a177ef LP |
679 | |
680 | assert(u); | |
681 | assert(other); | |
682 | assert(d < _UNIT_DEPENDENCY_MAX); | |
683 | ||
83a95334 | 684 | /* Fix backwards pointers */ |
ac155bb8 | 685 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
686 | UnitDependency k; |
687 | ||
e48614c4 | 688 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
689 | /* Do not add dependencies between u and itself */ |
690 | if (back == u) { | |
d1fab3fe | 691 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 692 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
693 | } else { |
694 | r = set_remove_and_put(back->dependencies[k], other, u); | |
695 | if (r == -EEXIST) | |
696 | set_remove(back->dependencies[k], other); | |
697 | else | |
698 | assert(r >= 0 || r == -ENOENT); | |
699 | } | |
e48614c4 | 700 | } |
23a177ef LP |
701 | } |
702 | ||
e66047ff | 703 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
704 | back = set_remove(other->dependencies[d], u); |
705 | if (back) | |
f2341e0a | 706 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 707 | |
7c0b05e5 MS |
708 | /* The move cannot fail. The caller must have performed a reservation. */ |
709 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 710 | |
525d3cc7 | 711 | other->dependencies[d] = set_free(other->dependencies[d]); |
23a177ef LP |
712 | } |
713 | ||
714 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 715 | UnitDependency d; |
d1fab3fe | 716 | const char *other_id = NULL; |
09a65f92 | 717 | int r; |
87f0e418 LP |
718 | |
719 | assert(u); | |
720 | assert(other); | |
ac155bb8 MS |
721 | assert(u->manager == other->manager); |
722 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 723 | |
cc916967 LP |
724 | other = unit_follow_merge(other); |
725 | ||
23a177ef LP |
726 | if (other == u) |
727 | return 0; | |
728 | ||
ac155bb8 | 729 | if (u->type != other->type) |
9e2f7c11 LP |
730 | return -EINVAL; |
731 | ||
ac155bb8 | 732 | if (!u->instance != !other->instance) |
87f0e418 LP |
733 | return -EINVAL; |
734 | ||
8a993b61 | 735 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
736 | return -EEXIST; |
737 | ||
ac155bb8 | 738 | if (other->load_state != UNIT_STUB && |
c2756a68 | 739 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 740 | return -EEXIST; |
87f0e418 | 741 | |
ac155bb8 | 742 | if (other->job) |
819e213f LP |
743 | return -EEXIST; |
744 | ||
e0209d83 MS |
745 | if (other->nop_job) |
746 | return -EEXIST; | |
747 | ||
fdf20a31 | 748 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
749 | return -EEXIST; |
750 | ||
d1fab3fe ZJS |
751 | if (other->id) |
752 | other_id = strdupa(other->id); | |
753 | ||
09a65f92 MS |
754 | /* Make reservations to ensure merge_dependencies() won't fail */ |
755 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
756 | r = reserve_dependencies(u, other, d); | |
757 | /* | |
758 | * We don't rollback reservations if we fail. We don't have | |
759 | * a way to undo reservations. A reservation is not a leak. | |
760 | */ | |
761 | if (r < 0) | |
762 | return r; | |
763 | } | |
764 | ||
87f0e418 | 765 | /* Merge names */ |
7c0b05e5 MS |
766 | r = merge_names(u, other); |
767 | if (r < 0) | |
768 | return r; | |
87f0e418 | 769 | |
57020a3a | 770 | /* Redirect all references */ |
ac155bb8 MS |
771 | while (other->refs) |
772 | unit_ref_set(other->refs, u); | |
57020a3a | 773 | |
87f0e418 LP |
774 | /* Merge dependencies */ |
775 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 776 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 777 | |
ac155bb8 MS |
778 | other->load_state = UNIT_MERGED; |
779 | other->merged_into = u; | |
23a177ef | 780 | |
3616a49c LP |
781 | /* If there is still some data attached to the other node, we |
782 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 783 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
784 | if (UNIT_VTABLE(other)->done) |
785 | UNIT_VTABLE(other)->done(other); | |
786 | ||
787 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
788 | unit_add_to_cleanup_queue(other); |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
793 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 794 | _cleanup_free_ char *s = NULL; |
23a177ef | 795 | Unit *other; |
9e2f7c11 | 796 | int r; |
23a177ef LP |
797 | |
798 | assert(u); | |
799 | assert(name); | |
800 | ||
7410616c | 801 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 802 | if (!u->instance) |
9e2f7c11 LP |
803 | return -EINVAL; |
804 | ||
7410616c LP |
805 | r = unit_name_replace_instance(name, u->instance, &s); |
806 | if (r < 0) | |
807 | return r; | |
9e2f7c11 LP |
808 | |
809 | name = s; | |
810 | } | |
811 | ||
c2756a68 | 812 | other = manager_get_unit(u->manager, name); |
7410616c LP |
813 | if (other) |
814 | return unit_merge(u, other); | |
23a177ef | 815 | |
7410616c | 816 | return unit_add_name(u, name); |
23a177ef LP |
817 | } |
818 | ||
819 | Unit* unit_follow_merge(Unit *u) { | |
820 | assert(u); | |
821 | ||
ac155bb8 MS |
822 | while (u->load_state == UNIT_MERGED) |
823 | assert_se(u = u->merged_into); | |
23a177ef LP |
824 | |
825 | return u; | |
826 | } | |
827 | ||
828 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
829 | int r; | |
830 | ||
831 | assert(u); | |
832 | assert(c); | |
833 | ||
36be24c8 ZJS |
834 | if (c->working_directory) { |
835 | r = unit_require_mounts_for(u, c->working_directory); | |
836 | if (r < 0) | |
837 | return r; | |
838 | } | |
839 | ||
840 | if (c->root_directory) { | |
841 | r = unit_require_mounts_for(u, c->root_directory); | |
842 | if (r < 0) | |
843 | return r; | |
844 | } | |
845 | ||
463d0d15 | 846 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
847 | return 0; |
848 | ||
849 | if (c->private_tmp) { | |
850 | r = unit_require_mounts_for(u, "/tmp"); | |
851 | if (r < 0) | |
852 | return r; | |
853 | ||
854 | r = unit_require_mounts_for(u, "/var/tmp"); | |
855 | if (r < 0) | |
856 | return r; | |
857 | } | |
858 | ||
ecc6e2b8 LP |
859 | if (c->std_output != EXEC_OUTPUT_KMSG && |
860 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 861 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
862 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
863 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 864 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 865 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 866 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 867 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 868 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 869 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 870 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
871 | return 0; |
872 | ||
873 | /* If syslog or kernel logging is requested, make sure our own | |
874 | * logging daemon is run first. */ | |
875 | ||
b46a529c LP |
876 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
877 | if (r < 0) | |
878 | return r; | |
23a177ef | 879 | |
87f0e418 LP |
880 | return 0; |
881 | } | |
882 | ||
87f0e418 LP |
883 | const char *unit_description(Unit *u) { |
884 | assert(u); | |
885 | ||
ac155bb8 MS |
886 | if (u->description) |
887 | return u->description; | |
87f0e418 | 888 | |
ac155bb8 | 889 | return strna(u->id); |
87f0e418 LP |
890 | } |
891 | ||
892 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 893 | char *t, **j; |
87f0e418 LP |
894 | UnitDependency d; |
895 | Iterator i; | |
47be870b | 896 | const char *prefix2; |
173e3821 | 897 | char |
a483fb59 | 898 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
899 | timestamp1[FORMAT_TIMESTAMP_MAX], |
900 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
901 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
902 | timestamp4[FORMAT_TIMESTAMP_MAX], |
903 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 904 | Unit *following; |
eeaedb7c LP |
905 | _cleanup_set_free_ Set *following_set = NULL; |
906 | int r; | |
05a98afd | 907 | const char *n; |
87f0e418 LP |
908 | |
909 | assert(u); | |
ac155bb8 | 910 | assert(u->type >= 0); |
87f0e418 | 911 | |
4c940960 | 912 | prefix = strempty(prefix); |
63c372cb | 913 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
914 | |
915 | fprintf(f, | |
40d50879 | 916 | "%s-> Unit %s:\n" |
87f0e418 | 917 | "%s\tDescription: %s\n" |
9e2f7c11 | 918 | "%s\tInstance: %s\n" |
87f0e418 | 919 | "%s\tUnit Load State: %s\n" |
2fad8195 | 920 | "%s\tUnit Active State: %s\n" |
b895d155 | 921 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 922 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 923 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 924 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 925 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 926 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 927 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 928 | "%s\tTransient: %s\n" |
4ad49000 LP |
929 | "%s\tSlice: %s\n" |
930 | "%s\tCGroup: %s\n" | |
931 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
932 | "%s\tCGroup mask: 0x%x\n" |
933 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 934 | prefix, u->id, |
87f0e418 | 935 | prefix, unit_description(u), |
ac155bb8 MS |
936 | prefix, strna(u->instance), |
937 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 938 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 939 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
940 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
941 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
942 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
943 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 944 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 945 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 946 | prefix, yes_no(u->transient), |
4ad49000 LP |
947 | prefix, strna(unit_slice_name(u)), |
948 | prefix, strna(u->cgroup_path), | |
949 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 950 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 951 | prefix, u->cgroup_members_mask); |
0301abf4 | 952 | |
ac155bb8 | 953 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
954 | fprintf(f, "%s\tName: %s\n", prefix, t); |
955 | ||
49dbfa7b LP |
956 | STRV_FOREACH(j, u->documentation) |
957 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
958 | ||
eeaedb7c LP |
959 | following = unit_following(u); |
960 | if (following) | |
ac155bb8 | 961 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 962 | |
eeaedb7c LP |
963 | r = unit_following_set(u, &following_set); |
964 | if (r >= 0) { | |
965 | Unit *other; | |
966 | ||
967 | SET_FOREACH(other, following_set, i) | |
968 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
969 | } | |
970 | ||
ac155bb8 MS |
971 | if (u->fragment_path) |
972 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 973 | |
1b64d026 LP |
974 | if (u->source_path) |
975 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
976 | ||
ae7a7182 | 977 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 978 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 979 | |
36c16a7c | 980 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 981 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 982 | |
f189ab18 LP |
983 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
984 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
985 | ||
986 | if (u->job_timeout_reboot_arg) | |
987 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
988 | ||
59fccdc5 LP |
989 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
990 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 991 | |
ac155bb8 | 992 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
993 | fprintf(f, |
994 | "%s\tCondition Timestamp: %s\n" | |
995 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
996 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
997 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 998 | |
59fccdc5 LP |
999 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1000 | fprintf(f, | |
1001 | "%s\tAssert Timestamp: %s\n" | |
1002 | "%s\tAssert Result: %s\n", | |
1003 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1004 | prefix, yes_no(u->assert_result)); | |
1005 | ||
87f0e418 LP |
1006 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
1007 | Unit *other; | |
1008 | ||
ac155bb8 MS |
1009 | SET_FOREACH(other, u->dependencies[d], i) |
1010 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
1011 | } |
1012 | ||
7c8fa05c | 1013 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
1014 | fprintf(f, |
1015 | "%s\tRequiresMountsFor:", prefix); | |
1016 | ||
1017 | STRV_FOREACH(j, u->requires_mounts_for) | |
1018 | fprintf(f, " %s", *j); | |
1019 | ||
1020 | fputs("\n", f); | |
1021 | } | |
1022 | ||
ac155bb8 | 1023 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1024 | |
b0650475 | 1025 | fprintf(f, |
a40eb732 | 1026 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1027 | "%s\tRefuseManualStart: %s\n" |
1028 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1029 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1030 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1031 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1032 | prefix, yes_no(u->stop_when_unneeded), |
1033 | prefix, yes_no(u->refuse_manual_start), | |
1034 | prefix, yes_no(u->refuse_manual_stop), | |
1035 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1036 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1037 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1038 | |
23a177ef LP |
1039 | if (UNIT_VTABLE(u)->dump) |
1040 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1041 | |
ac155bb8 | 1042 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1043 | fprintf(f, |
1044 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1045 | prefix, u->merged_into->id); |
1046 | else if (u->load_state == UNIT_ERROR) | |
1047 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1048 | |
05a98afd LP |
1049 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1050 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1051 | |
ac155bb8 MS |
1052 | if (u->job) |
1053 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1054 | |
e0209d83 MS |
1055 | if (u->nop_job) |
1056 | job_dump(u->nop_job, f, prefix2); | |
1057 | ||
87f0e418 LP |
1058 | } |
1059 | ||
1060 | /* Common implementation for multiple backends */ | |
e537352b | 1061 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1062 | int r; |
1063 | ||
1064 | assert(u); | |
23a177ef | 1065 | |
e48614c4 | 1066 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1067 | r = unit_load_fragment(u); |
1068 | if (r < 0) | |
23a177ef LP |
1069 | return r; |
1070 | ||
ac155bb8 | 1071 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1072 | return -ENOENT; |
1073 | ||
1074 | /* Load drop-in directory data */ | |
4ad49000 LP |
1075 | r = unit_load_dropin(unit_follow_merge(u)); |
1076 | if (r < 0) | |
23a177ef LP |
1077 | return r; |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | /* Common implementation for multiple backends */ | |
e537352b | 1083 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1084 | int r; |
87f0e418 LP |
1085 | |
1086 | assert(u); | |
1087 | ||
23a177ef LP |
1088 | /* Same as unit_load_fragment_and_dropin(), but whether |
1089 | * something can be loaded or not doesn't matter. */ | |
1090 | ||
1091 | /* Load a .service file */ | |
4ad49000 LP |
1092 | r = unit_load_fragment(u); |
1093 | if (r < 0) | |
87f0e418 LP |
1094 | return r; |
1095 | ||
ac155bb8 MS |
1096 | if (u->load_state == UNIT_STUB) |
1097 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1098 | |
87f0e418 | 1099 | /* Load drop-in directory data */ |
4ad49000 LP |
1100 | r = unit_load_dropin(unit_follow_merge(u)); |
1101 | if (r < 0) | |
87f0e418 LP |
1102 | return r; |
1103 | ||
23a177ef | 1104 | return 0; |
87f0e418 LP |
1105 | } |
1106 | ||
bba34eed | 1107 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1108 | assert(u); |
1109 | assert(target); | |
1110 | ||
ac155bb8 | 1111 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1112 | return 0; |
1113 | ||
35b8ca3a | 1114 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1115 | * that loop check below is reliable */ |
ac155bb8 MS |
1116 | if (u->load_state != UNIT_LOADED || |
1117 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1118 | return 0; |
1119 | ||
21256a2b LP |
1120 | /* If either side wants no automatic dependencies, then let's |
1121 | * skip this */ | |
ac155bb8 MS |
1122 | if (!u->default_dependencies || |
1123 | !target->default_dependencies) | |
21256a2b LP |
1124 | return 0; |
1125 | ||
98bc2000 | 1126 | /* Don't create loops */ |
ac155bb8 | 1127 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1128 | return 0; |
1129 | ||
1130 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1131 | } | |
1132 | ||
e954c9cf | 1133 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1134 | |
21256a2b LP |
1135 | static const UnitDependency deps[] = { |
1136 | UNIT_REQUIRED_BY, | |
be7d9ff7 | 1137 | UNIT_REQUISITE_OF, |
21256a2b LP |
1138 | UNIT_WANTED_BY, |
1139 | UNIT_BOUND_BY | |
1140 | }; | |
1141 | ||
bba34eed | 1142 | Unit *target; |
98bc2000 | 1143 | Iterator i; |
21256a2b | 1144 | unsigned k; |
db57f3c6 | 1145 | int r = 0; |
98bc2000 LP |
1146 | |
1147 | assert(u); | |
1148 | ||
21256a2b | 1149 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1150 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1151 | r = unit_add_default_target_dependency(u, target); | |
1152 | if (r < 0) | |
21256a2b | 1153 | return r; |
a016b922 LP |
1154 | } |
1155 | ||
e954c9cf LP |
1156 | return r; |
1157 | } | |
4ad49000 | 1158 | |
e954c9cf LP |
1159 | static int unit_add_slice_dependencies(Unit *u) { |
1160 | assert(u); | |
b81884e7 | 1161 | |
35b7ff80 | 1162 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1163 | return 0; |
1164 | ||
1165 | if (UNIT_ISSET(u->slice)) | |
8c8da0e0 | 1166 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true); |
e954c9cf | 1167 | |
8c8da0e0 | 1168 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1169 | return 0; |
1170 | ||
8c8da0e0 | 1171 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1172 | } |
1173 | ||
e954c9cf | 1174 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1175 | char **i; |
1176 | int r; | |
1177 | ||
1178 | assert(u); | |
1179 | ||
1180 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1181 | char prefix[strlen(*i) + 1]; | |
1182 | ||
1183 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
c7c89abb | 1184 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1185 | Unit *m; |
1186 | ||
c7c89abb | 1187 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1188 | if (r < 0) |
1189 | return r; | |
c7c89abb FB |
1190 | |
1191 | m = manager_get_unit(u->manager, p); | |
1192 | if (!m) { | |
1193 | /* Make sure to load the mount unit if | |
1194 | * it exists. If so the dependencies | |
1195 | * on this unit will be added later | |
1196 | * during the loading of the mount | |
1197 | * unit. */ | |
1198 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1199 | continue; |
c7c89abb | 1200 | } |
9588bc32 LP |
1201 | if (m == u) |
1202 | continue; | |
1203 | ||
1204 | if (m->load_state != UNIT_LOADED) | |
1205 | continue; | |
1206 | ||
1207 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1208 | if (r < 0) | |
1209 | return r; | |
1210 | ||
1211 | if (m->fragment_path) { | |
1212 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | } | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | return 0; | |
1220 | } | |
1221 | ||
95ae05c0 WC |
1222 | static int unit_add_startup_units(Unit *u) { |
1223 | CGroupContext *c; | |
5269eb6b | 1224 | int r; |
95ae05c0 WC |
1225 | |
1226 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1227 | if (!c) |
1228 | return 0; | |
1229 | ||
d53d9474 | 1230 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1231 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1232 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1233 | return 0; |
1234 | ||
5269eb6b LP |
1235 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1236 | if (r < 0) | |
1237 | return r; | |
1238 | ||
756c09e6 | 1239 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1240 | } |
1241 | ||
87f0e418 LP |
1242 | int unit_load(Unit *u) { |
1243 | int r; | |
1244 | ||
1245 | assert(u); | |
1246 | ||
ac155bb8 | 1247 | if (u->in_load_queue) { |
71fda00f | 1248 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1249 | u->in_load_queue = false; |
87f0e418 LP |
1250 | } |
1251 | ||
ac155bb8 | 1252 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1253 | return -EINVAL; |
1254 | ||
ac155bb8 | 1255 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1256 | return 0; |
1257 | ||
4f4afc88 LP |
1258 | if (u->transient_file) { |
1259 | r = fflush_and_check(u->transient_file); | |
1260 | if (r < 0) | |
1261 | goto fail; | |
1262 | ||
1263 | fclose(u->transient_file); | |
1264 | u->transient_file = NULL; | |
f9ba08fb | 1265 | |
f76707da | 1266 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1267 | } |
1268 | ||
c2756a68 LP |
1269 | if (UNIT_VTABLE(u)->load) { |
1270 | r = UNIT_VTABLE(u)->load(u); | |
1271 | if (r < 0) | |
87f0e418 | 1272 | goto fail; |
c2756a68 | 1273 | } |
23a177ef | 1274 | |
ac155bb8 | 1275 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1276 | r = -ENOENT; |
1277 | goto fail; | |
1278 | } | |
1279 | ||
7c8fa05c | 1280 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1281 | |
e954c9cf LP |
1282 | r = unit_add_target_dependencies(u); |
1283 | if (r < 0) | |
1284 | goto fail; | |
1285 | ||
1286 | r = unit_add_slice_dependencies(u); | |
1287 | if (r < 0) | |
1288 | goto fail; | |
c2756a68 | 1289 | |
e954c9cf | 1290 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1291 | if (r < 0) |
c2756a68 | 1292 | goto fail; |
7c8fa05c | 1293 | |
95ae05c0 WC |
1294 | r = unit_add_startup_units(u); |
1295 | if (r < 0) | |
1296 | goto fail; | |
1297 | ||
bc432dc7 | 1298 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1299 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1300 | r = -EINVAL; |
1301 | goto fail; | |
1302 | } | |
bc432dc7 LP |
1303 | |
1304 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1305 | } |
1306 | ||
ac155bb8 | 1307 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1308 | |
1309 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1310 | unit_add_to_gc_queue(u); |
87f0e418 | 1311 | |
87f0e418 LP |
1312 | return 0; |
1313 | ||
1314 | fail: | |
c2756a68 | 1315 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1316 | u->load_error = r; |
c1e1601e | 1317 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1318 | unit_add_to_gc_queue(u); |
23a177ef | 1319 | |
f2341e0a | 1320 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1321 | |
87f0e418 LP |
1322 | return r; |
1323 | } | |
1324 | ||
49365733 LP |
1325 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1326 | Condition *c; | |
1327 | int triggered = -1; | |
1328 | ||
1329 | assert(u); | |
1330 | assert(to_string); | |
1331 | ||
1332 | /* If the condition list is empty, then it is true */ | |
1333 | if (!first) | |
1334 | return true; | |
1335 | ||
1336 | /* Otherwise, if all of the non-trigger conditions apply and | |
1337 | * if any of the trigger conditions apply (unless there are | |
1338 | * none) we return true */ | |
1339 | LIST_FOREACH(conditions, c, first) { | |
1340 | int r; | |
1341 | ||
1342 | r = condition_test(c); | |
1343 | if (r < 0) | |
f2341e0a LP |
1344 | log_unit_warning(u, |
1345 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1346 | to_string(c->type), |
1347 | c->trigger ? "|" : "", | |
1348 | c->negate ? "!" : "", | |
f2341e0a | 1349 | c->parameter); |
49365733 | 1350 | else |
f2341e0a LP |
1351 | log_unit_debug(u, |
1352 | "%s=%s%s%s %s.", | |
49365733 LP |
1353 | to_string(c->type), |
1354 | c->trigger ? "|" : "", | |
1355 | c->negate ? "!" : "", | |
1356 | c->parameter, | |
f2341e0a | 1357 | condition_result_to_string(c->result)); |
49365733 LP |
1358 | |
1359 | if (!c->trigger && r <= 0) | |
1360 | return false; | |
1361 | ||
1362 | if (c->trigger && triggered <= 0) | |
1363 | triggered = r > 0; | |
1364 | } | |
1365 | ||
1366 | return triggered != 0; | |
1367 | } | |
1368 | ||
9588bc32 | 1369 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1370 | assert(u); |
1371 | ||
ac155bb8 | 1372 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1373 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1374 | |
ac155bb8 | 1375 | return u->condition_result; |
90bbc946 LP |
1376 | } |
1377 | ||
59fccdc5 LP |
1378 | static bool unit_assert_test(Unit *u) { |
1379 | assert(u); | |
1380 | ||
1381 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1382 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1383 | |
1384 | return u->assert_result; | |
1385 | } | |
1386 | ||
df446f96 LP |
1387 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1388 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1389 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1390 | REENABLE_WARNING; | |
1391 | } | |
1392 | ||
44a6b1b6 | 1393 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1394 | const char *format; |
a85ca902 | 1395 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1396 | |
1397 | assert(u); | |
df446f96 | 1398 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1399 | |
b5bf308b | 1400 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1401 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1402 | if (format_table) { | |
1403 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1404 | if (format) | |
1405 | return format; | |
1406 | } | |
1407 | } | |
877d54e9 LP |
1408 | |
1409 | /* Return generic strings */ | |
1410 | if (t == JOB_START) | |
1411 | return "Starting %s."; | |
1412 | else if (t == JOB_STOP) | |
1413 | return "Stopping %s."; | |
b5bf308b | 1414 | else |
877d54e9 | 1415 | return "Reloading %s."; |
877d54e9 LP |
1416 | } |
1417 | ||
1418 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1419 | const char *format; | |
1420 | ||
1421 | assert(u); | |
1422 | ||
df446f96 LP |
1423 | /* Reload status messages have traditionally not been printed to console. */ |
1424 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1425 | return; | |
1426 | ||
877d54e9 | 1427 | format = unit_get_status_message_format(u, t); |
c6918296 | 1428 | |
bcfce235 | 1429 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1430 | unit_status_printf(u, "", format); |
bcfce235 | 1431 | REENABLE_WARNING; |
c6918296 MS |
1432 | } |
1433 | ||
877d54e9 LP |
1434 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1435 | const char *format; | |
1436 | char buf[LINE_MAX]; | |
1437 | sd_id128_t mid; | |
1438 | ||
1439 | assert(u); | |
1440 | ||
df446f96 | 1441 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1442 | return; |
1443 | ||
81270860 LP |
1444 | if (log_on_console()) |
1445 | return; | |
1446 | ||
877d54e9 LP |
1447 | /* We log status messages for all units and all operations. */ |
1448 | ||
a85ca902 | 1449 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1450 | |
bcfce235 | 1451 | DISABLE_WARNING_FORMAT_NONLITERAL; |
d054f0a4 | 1452 | xsprintf(buf, format, unit_description(u)); |
bcfce235 | 1453 | REENABLE_WARNING; |
877d54e9 LP |
1454 | |
1455 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1456 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1457 | SD_MESSAGE_UNIT_RELOADING; | |
1458 | ||
f2341e0a LP |
1459 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1460 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1461 | * closely what is written to screen using the status output, | |
1462 | * which is supposed the highest level, friendliest output | |
1463 | * possible, which means we should avoid the low-level unit | |
1464 | * name. */ | |
1465 | log_struct(LOG_INFO, | |
1466 | LOG_MESSAGE_ID(mid), | |
1467 | LOG_UNIT_ID(u), | |
1468 | LOG_MESSAGE("%s", buf), | |
1469 | NULL); | |
877d54e9 | 1470 | } |
877d54e9 | 1471 | |
d1a34ae9 | 1472 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1473 | assert(u); |
1474 | assert(t >= 0); | |
1475 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1476 | |
1477 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1478 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1479 | } |
1480 | ||
07299350 | 1481 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1482 | assert(u); |
1483 | ||
1484 | if (ratelimit_test(&u->start_limit)) { | |
1485 | u->start_limit_hit = false; | |
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | log_unit_warning(u, "Start request repeated too quickly."); | |
1490 | u->start_limit_hit = true; | |
1491 | ||
1492 | return failure_action(u->manager, u->start_limit_action, u->reboot_arg); | |
1493 | } | |
1494 | ||
87f0e418 | 1495 | /* Errors: |
6bf0f408 LP |
1496 | * -EBADR: This unit type does not support starting. |
1497 | * -EALREADY: Unit is already started. | |
1498 | * -EAGAIN: An operation is already in progress. Retry later. | |
1499 | * -ECANCELED: Too many requests for now. | |
1500 | * -EPROTO: Assert failed | |
1501 | * -EINVAL: Unit not loaded | |
1502 | * -EOPNOTSUPP: Unit type not supported | |
87f0e418 LP |
1503 | */ |
1504 | int unit_start(Unit *u) { | |
1505 | UnitActiveState state; | |
92ab323c | 1506 | Unit *following; |
87f0e418 LP |
1507 | |
1508 | assert(u); | |
1509 | ||
a82e5507 LP |
1510 | /* If this is already started, then this will succeed. Note |
1511 | * that this will even succeed if this unit is not startable | |
1512 | * by the user. This is relied on to detect when we need to | |
1513 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1514 | state = unit_active_state(u); |
1515 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1516 | return -EALREADY; | |
1517 | ||
6bf0f408 LP |
1518 | /* Units that aren't loaded cannot be started */ |
1519 | if (u->load_state != UNIT_LOADED) | |
1520 | return -EINVAL; | |
1521 | ||
a82e5507 LP |
1522 | /* If the conditions failed, don't do anything at all. If we |
1523 | * already are activating this call might still be useful to | |
1524 | * speed up activation in case there is some hold-off time, | |
1525 | * but we don't want to recheck the condition in that case. */ | |
1526 | if (state != UNIT_ACTIVATING && | |
1527 | !unit_condition_test(u)) { | |
f2341e0a | 1528 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1529 | return -EALREADY; |
1530 | } | |
1531 | ||
59fccdc5 LP |
1532 | /* If the asserts failed, fail the entire job */ |
1533 | if (state != UNIT_ACTIVATING && | |
1534 | !unit_assert_test(u)) { | |
f2341e0a | 1535 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1536 | return -EPROTO; |
1537 | } | |
1538 | ||
d11a7645 LP |
1539 | /* Units of types that aren't supported cannot be |
1540 | * started. Note that we do this test only after the condition | |
1541 | * checks, so that we rather return condition check errors | |
1542 | * (which are usually not considered a true failure) than "not | |
1543 | * supported" errors (which are considered a failure). | |
1544 | */ | |
1545 | if (!unit_supported(u)) | |
1546 | return -EOPNOTSUPP; | |
1547 | ||
92ab323c | 1548 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1549 | following = unit_following(u); |
1550 | if (following) { | |
f2341e0a | 1551 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1552 | return unit_start(following); |
1553 | } | |
1554 | ||
1555 | /* If it is stopped, but we cannot start it, then fail */ | |
1556 | if (!UNIT_VTABLE(u)->start) | |
1557 | return -EBADR; | |
1558 | ||
87f0e418 LP |
1559 | /* We don't suppress calls to ->start() here when we are |
1560 | * already starting, to allow this request to be used as a | |
1561 | * "hurry up" call, for example when the unit is in some "auto | |
1562 | * restart" state where it waits for a holdoff timer to elapse | |
1563 | * before it will start again. */ | |
1564 | ||
c1e1601e | 1565 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1566 | |
d1a34ae9 | 1567 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1568 | } |
1569 | ||
1570 | bool unit_can_start(Unit *u) { | |
1571 | assert(u); | |
1572 | ||
8ff4d2ab LP |
1573 | if (u->load_state != UNIT_LOADED) |
1574 | return false; | |
1575 | ||
1576 | if (!unit_supported(u)) | |
1577 | return false; | |
1578 | ||
87f0e418 LP |
1579 | return !!UNIT_VTABLE(u)->start; |
1580 | } | |
1581 | ||
2528a7a6 LP |
1582 | bool unit_can_isolate(Unit *u) { |
1583 | assert(u); | |
1584 | ||
1585 | return unit_can_start(u) && | |
ac155bb8 | 1586 | u->allow_isolate; |
2528a7a6 LP |
1587 | } |
1588 | ||
87f0e418 LP |
1589 | /* Errors: |
1590 | * -EBADR: This unit type does not support stopping. | |
1591 | * -EALREADY: Unit is already stopped. | |
1592 | * -EAGAIN: An operation is already in progress. Retry later. | |
1593 | */ | |
1594 | int unit_stop(Unit *u) { | |
1595 | UnitActiveState state; | |
92ab323c | 1596 | Unit *following; |
87f0e418 LP |
1597 | |
1598 | assert(u); | |
1599 | ||
87f0e418 | 1600 | state = unit_active_state(u); |
fdf20a31 | 1601 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1602 | return -EALREADY; |
1603 | ||
0faacd47 LP |
1604 | following = unit_following(u); |
1605 | if (following) { | |
f2341e0a | 1606 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1607 | return unit_stop(following); |
1608 | } | |
1609 | ||
7898b0cf LP |
1610 | if (!UNIT_VTABLE(u)->stop) |
1611 | return -EBADR; | |
1612 | ||
c1e1601e | 1613 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1614 | |
d1a34ae9 | 1615 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1616 | } |
1617 | ||
1618 | /* Errors: | |
1619 | * -EBADR: This unit type does not support reloading. | |
1620 | * -ENOEXEC: Unit is not started. | |
1621 | * -EAGAIN: An operation is already in progress. Retry later. | |
1622 | */ | |
1623 | int unit_reload(Unit *u) { | |
1624 | UnitActiveState state; | |
92ab323c | 1625 | Unit *following; |
87f0e418 LP |
1626 | |
1627 | assert(u); | |
1628 | ||
ac155bb8 | 1629 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1630 | return -EINVAL; |
1631 | ||
87f0e418 LP |
1632 | if (!unit_can_reload(u)) |
1633 | return -EBADR; | |
1634 | ||
1635 | state = unit_active_state(u); | |
e364ad06 | 1636 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1637 | return -EALREADY; |
1638 | ||
6a371e23 | 1639 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1640 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1641 | return -ENOEXEC; |
6a371e23 | 1642 | } |
87f0e418 | 1643 | |
e48614c4 ZJS |
1644 | following = unit_following(u); |
1645 | if (following) { | |
f2341e0a | 1646 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1647 | return unit_reload(following); |
1648 | } | |
1649 | ||
c1e1601e | 1650 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1651 | |
d1a34ae9 | 1652 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1653 | } |
1654 | ||
1655 | bool unit_can_reload(Unit *u) { | |
1656 | assert(u); | |
1657 | ||
1658 | if (!UNIT_VTABLE(u)->reload) | |
1659 | return false; | |
1660 | ||
1661 | if (!UNIT_VTABLE(u)->can_reload) | |
1662 | return true; | |
1663 | ||
1664 | return UNIT_VTABLE(u)->can_reload(u); | |
1665 | } | |
1666 | ||
b4a16b7b | 1667 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1668 | |
4afd3348 | 1669 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1670 | |
be7d9ff7 LP |
1671 | static const UnitDependency needed_dependencies[] = { |
1672 | UNIT_REQUIRED_BY, | |
084918ba | 1673 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1674 | UNIT_WANTED_BY, |
1675 | UNIT_BOUND_BY, | |
1676 | }; | |
1677 | ||
f3bff0eb | 1678 | Unit *other; |
be7d9ff7 LP |
1679 | Iterator i; |
1680 | unsigned j; | |
1681 | int r; | |
f3bff0eb LP |
1682 | |
1683 | assert(u); | |
1684 | ||
1685 | /* If this service shall be shut down when unneeded then do | |
1686 | * so. */ | |
1687 | ||
ac155bb8 | 1688 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1689 | return; |
1690 | ||
1691 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1692 | return; | |
1693 | ||
be7d9ff7 | 1694 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1695 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1696 | if (unit_active_or_pending(other)) |
1697 | return; | |
b81884e7 | 1698 | |
595bfe7d | 1699 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
1700 | * loop here, hence stop acting on the service being |
1701 | * unnecessary after a while. */ | |
67bfdc97 | 1702 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1703 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1704 | return; | |
1705 | } | |
1706 | ||
f2341e0a | 1707 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1708 | |
1709 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 1710 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 1711 | if (r < 0) |
4bd29fe5 | 1712 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
1713 | } |
1714 | ||
ff502445 | 1715 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 1716 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1717 | bool stop = false; |
1718 | Unit *other; | |
1719 | Iterator i; | |
67bfdc97 | 1720 | int r; |
ff502445 LP |
1721 | |
1722 | assert(u); | |
1723 | ||
1724 | if (u->job) | |
1725 | return; | |
1726 | ||
1727 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1728 | return; | |
1729 | ||
1730 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1731 | if (other->job) | |
1732 | continue; | |
1733 | ||
1734 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1735 | continue; | |
1736 | ||
1737 | stop = true; | |
98f738b6 | 1738 | break; |
ff502445 LP |
1739 | } |
1740 | ||
1741 | if (!stop) | |
1742 | return; | |
1743 | ||
595bfe7d | 1744 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
1745 | * loop here, hence stop acting on the service being |
1746 | * unnecessary after a while. */ | |
1747 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1748 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1749 | return; | |
1750 | } | |
1751 | ||
98f738b6 | 1752 | assert(other); |
f2341e0a | 1753 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1754 | |
1755 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 1756 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 1757 | if (r < 0) |
4bd29fe5 | 1758 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
1759 | } |
1760 | ||
87f0e418 LP |
1761 | static void retroactively_start_dependencies(Unit *u) { |
1762 | Iterator i; | |
1763 | Unit *other; | |
1764 | ||
1765 | assert(u); | |
1766 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1767 | ||
ac155bb8 MS |
1768 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1769 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1770 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1771 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 1772 | |
7f2cddae | 1773 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1774 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1775 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1776 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 1777 | |
ac155bb8 MS |
1778 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1779 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1780 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1781 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 1782 | |
ac155bb8 | 1783 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1784 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1785 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 1786 | |
ac155bb8 | 1787 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1788 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1789 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
1790 | } |
1791 | ||
1792 | static void retroactively_stop_dependencies(Unit *u) { | |
1793 | Iterator i; | |
1794 | Unit *other; | |
1795 | ||
1796 | assert(u); | |
1797 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1798 | ||
b81884e7 | 1799 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1800 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1801 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1802 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
1803 | } |
1804 | ||
1805 | static void check_unneeded_dependencies(Unit *u) { | |
1806 | Iterator i; | |
1807 | Unit *other; | |
1808 | ||
1809 | assert(u); | |
1810 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1811 | |
1812 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1813 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1814 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1815 | unit_check_unneeded(other); |
ac155bb8 | 1816 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1817 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1818 | unit_check_unneeded(other); |
ac155bb8 | 1819 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1820 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1821 | unit_check_unneeded(other); |
7f2cddae | 1822 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1823 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1824 | unit_check_unneeded(other); | |
87f0e418 LP |
1825 | } |
1826 | ||
3ecaa09b | 1827 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1828 | Unit *other; |
1829 | Iterator i; | |
1830 | ||
1831 | assert(u); | |
1832 | ||
ac155bb8 | 1833 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1834 | return; |
1835 | ||
f2341e0a | 1836 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1837 | |
ac155bb8 | 1838 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1839 | int r; |
1840 | ||
4bd29fe5 | 1841 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 1842 | if (r < 0) |
f2341e0a | 1843 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1844 | } |
c0daa706 LP |
1845 | } |
1846 | ||
3ecaa09b LP |
1847 | void unit_trigger_notify(Unit *u) { |
1848 | Unit *other; | |
1849 | Iterator i; | |
1850 | ||
1851 | assert(u); | |
1852 | ||
1853 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1854 | if (UNIT_VTABLE(other)->trigger_notify) | |
1855 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1856 | } | |
1857 | ||
e2f3b44c | 1858 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1859 | Manager *m; |
7e6e7b06 | 1860 | bool unexpected; |
a096ed36 | 1861 | |
87f0e418 LP |
1862 | assert(u); |
1863 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1864 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1865 | |
8e471ccd LP |
1866 | /* Note that this is called for all low-level state changes, |
1867 | * even if they might map to the same high-level | |
865cc19a | 1868 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1869 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1870 | * this function will be called too! */ |
87f0e418 | 1871 | |
546ac4f0 MS |
1872 | m = u->manager; |
1873 | ||
f755e3b7 | 1874 | /* Update timestamps for state changes */ |
2c289ea8 | 1875 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 1876 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 1877 | |
bdbf9951 | 1878 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 1879 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 1880 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 1881 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
1882 | |
1883 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 1884 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 1885 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 1886 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 1887 | } |
87f0e418 | 1888 | |
865cc19a | 1889 | /* Keep track of failed units */ |
5269eb6b | 1890 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1891 | |
1892 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1893 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
efdb0237 | 1894 | unit_prune_cgroup(u); |
fb385181 | 1895 | |
9cd86184 | 1896 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1897 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1898 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1899 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1900 | ExecContext *ec; |
1901 | ||
1902 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1903 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 | 1904 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
313cefa1 | 1905 | m->n_on_console--; |
31a7eb86 ZJS |
1906 | |
1907 | if (m->n_on_console == 0) | |
1908 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1909 | m->no_console_output = false; |
31a7eb86 | 1910 | } else |
313cefa1 | 1911 | m->n_on_console++; |
7ed9f6cd MS |
1912 | } |
1913 | } | |
1914 | ||
ac155bb8 | 1915 | if (u->job) { |
7e6e7b06 | 1916 | unexpected = false; |
87f0e418 | 1917 | |
ac155bb8 | 1918 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1919 | |
1920 | /* So we reached a different state for this | |
1921 | * job. Let's see if we can run it now if it | |
1922 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1923 | job_add_to_run_queue(u->job); |
87f0e418 | 1924 | |
b410e6b9 | 1925 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1926 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1927 | * hence needs to invalidate jobs. */ |
87f0e418 | 1928 | |
ac155bb8 | 1929 | switch (u->job->type) { |
87f0e418 | 1930 | |
b410e6b9 LP |
1931 | case JOB_START: |
1932 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1933 | |
b410e6b9 | 1934 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 1935 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 1936 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1937 | unexpected = true; |
41b02ec7 | 1938 | |
fdf20a31 | 1939 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 1940 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 1941 | } |
87f0e418 | 1942 | |
b410e6b9 | 1943 | break; |
87f0e418 | 1944 | |
b410e6b9 LP |
1945 | case JOB_RELOAD: |
1946 | case JOB_RELOAD_OR_START: | |
3282591d | 1947 | case JOB_TRY_RELOAD: |
87f0e418 | 1948 | |
ac155bb8 | 1949 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1950 | if (ns == UNIT_ACTIVE) |
833f92ad | 1951 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
032ff4af | 1952 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1953 | unexpected = true; |
41b02ec7 | 1954 | |
fdf20a31 | 1955 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 1956 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 1957 | } |
b410e6b9 | 1958 | } |
87f0e418 | 1959 | |
b410e6b9 | 1960 | break; |
87f0e418 | 1961 | |
b410e6b9 LP |
1962 | case JOB_STOP: |
1963 | case JOB_RESTART: | |
1964 | case JOB_TRY_RESTART: | |
87f0e418 | 1965 | |
fdf20a31 | 1966 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 1967 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 1968 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1969 | unexpected = true; |
833f92ad | 1970 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 1971 | } |
87f0e418 | 1972 | |
b410e6b9 | 1973 | break; |
87f0e418 | 1974 | |
b410e6b9 LP |
1975 | default: |
1976 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1977 | } |
87f0e418 | 1978 | |
7e6e7b06 LP |
1979 | } else |
1980 | unexpected = true; | |
1981 | ||
2c289ea8 | 1982 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 1983 | |
bdbf9951 LP |
1984 | /* If this state change happened without being |
1985 | * requested by a job, then let's retroactively start | |
1986 | * or stop dependencies. We skip that step when | |
1987 | * deserializing, since we don't want to create any | |
1988 | * additional jobs just because something is already | |
1989 | * activated. */ | |
1990 | ||
1991 | if (unexpected) { | |
1992 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1993 | retroactively_start_dependencies(u); | |
1994 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1995 | retroactively_stop_dependencies(u); | |
1996 | } | |
5de9682c | 1997 | |
cd0504d0 | 1998 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1999 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
2000 | check_unneeded_dependencies(u); |
2001 | ||
bdbf9951 | 2002 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 2003 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 2004 | unit_start_on_failure(u); |
cd6d0a45 | 2005 | } |
3b2775c5 | 2006 | } |
e537352b | 2007 | |
3b2775c5 LP |
2008 | /* Some names are special */ |
2009 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2010 | ||
2011 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 2012 | /* The bus might have just become available, |
3b2775c5 LP |
2013 | * hence try to connect to it, if we aren't |
2014 | * yet connected. */ | |
546ac4f0 | 2015 | bus_init(m, true); |
3b2775c5 | 2016 | |
ac155bb8 | 2017 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2018 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2019 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2020 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2021 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2022 | u->in_audit = true; |
3b2775c5 | 2023 | } |
e983b760 | 2024 | |
3b2775c5 | 2025 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2026 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2027 | |
3b2775c5 | 2028 | } else { |
bdbf9951 | 2029 | |
3b2775c5 LP |
2030 | /* We don't care about D-Bus here, since we'll get an |
2031 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 2032 | |
ac155bb8 | 2033 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
2034 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2035 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
2c289ea8 | 2036 | !MANAGER_IS_RELOADING(m)) { |
4927fcae | 2037 | |
3b2775c5 LP |
2038 | /* Hmm, if there was no start record written |
2039 | * write it now, so that we always have a nice | |
2040 | * pair */ | |
ac155bb8 | 2041 | if (!u->in_audit) { |
546ac4f0 | 2042 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 2043 | |
3b2775c5 | 2044 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 2045 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
2046 | } else |
2047 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 2048 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 2049 | |
ac155bb8 | 2050 | u->in_audit = false; |
cd6d0a45 | 2051 | } |
f278026d LP |
2052 | } |
2053 | ||
546ac4f0 | 2054 | manager_recheck_journal(m); |
3ecaa09b | 2055 | unit_trigger_notify(u); |
3b2775c5 | 2056 | |
2c289ea8 | 2057 | if (!MANAGER_IS_RELOADING(u->manager)) { |
ff502445 LP |
2058 | /* Maybe we finished startup and are now ready for |
2059 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2060 | unit_check_unneeded(u); |
c1e1601e | 2061 | |
ff502445 LP |
2062 | /* Maybe we finished startup, but something we needed |
2063 | * has vanished? Let's die then. (This happens when | |
2064 | * something BindsTo= to a Type=oneshot unit, as these | |
2065 | * units go directly from starting to inactive, | |
2066 | * without ever entering started.) */ | |
2067 | unit_check_binds_to(u); | |
2068 | } | |
2069 | ||
c1e1601e | 2070 | unit_add_to_dbus_queue(u); |
701cc384 | 2071 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2072 | } |
2073 | ||
87f0e418 | 2074 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2075 | int q, r; |
2076 | ||
87f0e418 LP |
2077 | assert(u); |
2078 | assert(pid >= 1); | |
2079 | ||
5ba6985b LP |
2080 | /* Watch a specific PID. We only support one or two units |
2081 | * watching each PID for now, not more. */ | |
2082 | ||
d5099efc | 2083 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2084 | if (r < 0) |
2085 | return r; | |
2086 | ||
d5099efc | 2087 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2088 | if (r < 0) |
2089 | return r; | |
2090 | ||
fea72cc0 | 2091 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2092 | if (r == -EEXIST) { |
d5099efc | 2093 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2094 | if (r < 0) |
2095 | return r; | |
05e343b7 | 2096 | |
fea72cc0 | 2097 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2098 | } |
a911bb9a | 2099 | |
fea72cc0 | 2100 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2101 | if (q < 0) |
2102 | return q; | |
2103 | ||
2104 | return r; | |
87f0e418 LP |
2105 | } |
2106 | ||
2107 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2108 | assert(u); | |
2109 | assert(pid >= 1); | |
2110 | ||
fea72cc0 LP |
2111 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2112 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2113 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2114 | } |
2115 | ||
bd44e61b LP |
2116 | void unit_unwatch_all_pids(Unit *u) { |
2117 | assert(u); | |
2118 | ||
2119 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2120 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2121 | |
efdb0237 | 2122 | u->pids = set_free(u->pids); |
a911bb9a LP |
2123 | } |
2124 | ||
2125 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2126 | Iterator i; | |
2127 | void *e; | |
2128 | ||
2129 | assert(u); | |
2130 | ||
2131 | /* Cleans dead PIDs from our list */ | |
2132 | ||
2133 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2134 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2135 | |
2136 | if (pid == except1 || pid == except2) | |
2137 | continue; | |
2138 | ||
9f5650ae | 2139 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2140 | unit_unwatch_pid(u, pid); |
a911bb9a | 2141 | } |
87f0e418 LP |
2142 | } |
2143 | ||
87f0e418 LP |
2144 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2145 | assert(u); | |
2146 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2147 | ||
2148 | switch (j) { | |
2149 | ||
2150 | case JOB_VERIFY_ACTIVE: | |
2151 | case JOB_START: | |
57339f47 | 2152 | case JOB_STOP: |
e0209d83 | 2153 | case JOB_NOP: |
87f0e418 LP |
2154 | return true; |
2155 | ||
87f0e418 LP |
2156 | case JOB_RESTART: |
2157 | case JOB_TRY_RESTART: | |
2158 | return unit_can_start(u); | |
2159 | ||
2160 | case JOB_RELOAD: | |
3282591d | 2161 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2162 | return unit_can_reload(u); |
2163 | ||
2164 | case JOB_RELOAD_OR_START: | |
2165 | return unit_can_reload(u) && unit_can_start(u); | |
2166 | ||
2167 | default: | |
2168 | assert_not_reached("Invalid job type"); | |
2169 | } | |
2170 | } | |
2171 | ||
f2341e0a LP |
2172 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2173 | assert(u); | |
d1fab3fe | 2174 | |
f2341e0a LP |
2175 | /* Only warn about some unit types */ |
2176 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2177 | return; | |
3f3cc397 | 2178 | |
f2341e0a LP |
2179 | if (streq_ptr(u->id, other)) |
2180 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2181 | else | |
2182 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2183 | } |
2184 | ||
701cc384 | 2185 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2186 | |
2187 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2188 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2189 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2190 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2191 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2192 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2193 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2194 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2195 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2196 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2197 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2198 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2199 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2200 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2201 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2202 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2203 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2204 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2205 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2206 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2207 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2208 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2209 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2210 | }; |
701cc384 | 2211 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2212 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2213 | |
2214 | assert(u); | |
2215 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2216 | assert(other); |
2217 | ||
9f151f29 LP |
2218 | u = unit_follow_merge(u); |
2219 | other = unit_follow_merge(other); | |
2220 | ||
87f0e418 LP |
2221 | /* We won't allow dependencies on ourselves. We will not |
2222 | * consider them an error however. */ | |
d1fab3fe | 2223 | if (u == other) { |
f2341e0a | 2224 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2225 | return 0; |
d1fab3fe | 2226 | } |
87f0e418 | 2227 | |
d5099efc | 2228 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2229 | if (r < 0) |
87f0e418 LP |
2230 | return r; |
2231 | ||
613b411c | 2232 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2233 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2234 | if (r < 0) |
2235 | return r; | |
2236 | } | |
2237 | ||
2238 | if (add_reference) { | |
d5099efc | 2239 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2240 | if (r < 0) |
5de9682c LP |
2241 | return r; |
2242 | ||
d5099efc | 2243 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2244 | if (r < 0) |
701cc384 | 2245 | return r; |
613b411c | 2246 | } |
87f0e418 | 2247 | |
613b411c LP |
2248 | q = set_put(u->dependencies[d], other); |
2249 | if (q < 0) | |
701cc384 | 2250 | return q; |
87f0e418 | 2251 | |
613b411c LP |
2252 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2253 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2254 | if (v < 0) { | |
5de9682c LP |
2255 | r = v; |
2256 | goto fail; | |
2257 | } | |
613b411c | 2258 | } |
701cc384 LP |
2259 | |
2260 | if (add_reference) { | |
613b411c LP |
2261 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2262 | if (w < 0) { | |
701cc384 LP |
2263 | r = w; |
2264 | goto fail; | |
2265 | } | |
2266 | ||
613b411c LP |
2267 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2268 | if (r < 0) | |
701cc384 | 2269 | goto fail; |
87f0e418 LP |
2270 | } |
2271 | ||
c1e1601e | 2272 | unit_add_to_dbus_queue(u); |
87f0e418 | 2273 | return 0; |
701cc384 LP |
2274 | |
2275 | fail: | |
2276 | if (q > 0) | |
ac155bb8 | 2277 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2278 | |
2279 | if (v > 0) | |
ac155bb8 | 2280 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2281 | |
2282 | if (w > 0) | |
ac155bb8 | 2283 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2284 | |
2285 | return r; | |
87f0e418 | 2286 | } |
0301abf4 | 2287 | |
2c966c03 LP |
2288 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2289 | int r; | |
2290 | ||
2291 | assert(u); | |
2292 | ||
3f3cc397 LP |
2293 | r = unit_add_dependency(u, d, other, add_reference); |
2294 | if (r < 0) | |
2c966c03 LP |
2295 | return r; |
2296 | ||
7410616c | 2297 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2298 | } |
2299 | ||
7410616c LP |
2300 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2301 | int r; | |
9e2f7c11 LP |
2302 | |
2303 | assert(u); | |
2304 | assert(name || path); | |
7410616c LP |
2305 | assert(buf); |
2306 | assert(ret); | |
9e2f7c11 LP |
2307 | |
2308 | if (!name) | |
2b6bf07d | 2309 | name = basename(path); |
9e2f7c11 | 2310 | |
7410616c LP |
2311 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2312 | *buf = NULL; | |
2313 | *ret = name; | |
2314 | return 0; | |
9e2f7c11 LP |
2315 | } |
2316 | ||
ac155bb8 | 2317 | if (u->instance) |
7410616c | 2318 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2319 | else { |
ae018d9b | 2320 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2321 | |
7410616c LP |
2322 | r = unit_name_to_prefix(u->id, &i); |
2323 | if (r < 0) | |
2324 | return r; | |
9e2f7c11 | 2325 | |
7410616c | 2326 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2327 | } |
7410616c LP |
2328 | if (r < 0) |
2329 | return r; | |
9e2f7c11 | 2330 | |
7410616c LP |
2331 | *ret = *buf; |
2332 | return 0; | |
9e2f7c11 LP |
2333 | } |
2334 | ||
701cc384 | 2335 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2336 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2337 | Unit *other; |
2338 | int r; | |
2339 | ||
9e2f7c11 LP |
2340 | assert(u); |
2341 | assert(name || path); | |
09b6b09f | 2342 | |
7410616c LP |
2343 | r = resolve_template(u, name, path, &buf, &name); |
2344 | if (r < 0) | |
2345 | return r; | |
09b6b09f | 2346 | |
8afbb8e1 LP |
2347 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2348 | if (r < 0) | |
2349 | return r; | |
9e2f7c11 | 2350 | |
8afbb8e1 | 2351 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2352 | } |
2353 | ||
2c966c03 | 2354 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2355 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2356 | Unit *other; |
2357 | int r; | |
2c966c03 LP |
2358 | |
2359 | assert(u); | |
2360 | assert(name || path); | |
2361 | ||
7410616c LP |
2362 | r = resolve_template(u, name, path, &buf, &name); |
2363 | if (r < 0) | |
2364 | return r; | |
2c966c03 | 2365 | |
3f3cc397 LP |
2366 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2367 | if (r < 0) | |
68eda4bd | 2368 | return r; |
2c966c03 | 2369 | |
3f3cc397 | 2370 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2371 | } |
2372 | ||
0301abf4 | 2373 | int set_unit_path(const char *p) { |
0301abf4 | 2374 | /* This is mostly for debug purposes */ |
cbe46ead | 2375 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2376 | return -errno; |
0301abf4 LP |
2377 | |
2378 | return 0; | |
2379 | } | |
88066b3a | 2380 | |
ea430986 | 2381 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2382 | assert(u); |
2383 | ||
ac155bb8 | 2384 | if (!u->id) |
04ade7d2 LP |
2385 | return NULL; |
2386 | ||
48899192 | 2387 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2388 | } |
2389 | ||
d79200e2 LP |
2390 | int unit_set_slice(Unit *u, Unit *slice) { |
2391 | assert(u); | |
2392 | assert(slice); | |
2393 | ||
2394 | /* Sets the unit slice if it has not been set before. Is extra | |
2395 | * careful, to only allow this for units that actually have a | |
2396 | * cgroup context. Also, we don't allow to set this for slices | |
2397 | * (since the parent slice is derived from the name). Make | |
2398 | * sure the unit we set is actually a slice. */ | |
2399 | ||
2400 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2401 | return -EOPNOTSUPP; | |
2402 | ||
2403 | if (u->type == UNIT_SLICE) | |
2404 | return -EINVAL; | |
2405 | ||
102ef982 LP |
2406 | if (unit_active_state(u) != UNIT_INACTIVE) |
2407 | return -EBUSY; | |
2408 | ||
d79200e2 LP |
2409 | if (slice->type != UNIT_SLICE) |
2410 | return -EINVAL; | |
2411 | ||
efdb0237 LP |
2412 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2413 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2414 | return -EPERM; | |
2415 | ||
d79200e2 LP |
2416 | if (UNIT_DEREF(u->slice) == slice) |
2417 | return 0; | |
2418 | ||
99e66921 TH |
2419 | /* Disallow slice changes if @u is already bound to cgroups */ |
2420 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2421 | return -EBUSY; |
2422 | ||
99e66921 | 2423 | unit_ref_unset(&u->slice); |
d79200e2 LP |
2424 | unit_ref_set(&u->slice, slice); |
2425 | return 1; | |
2426 | } | |
2427 | ||
2428 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2429 | _cleanup_free_ char *b = NULL; |
2430 | const char *slice_name; | |
a016b922 LP |
2431 | Unit *slice; |
2432 | int r; | |
2433 | ||
2434 | assert(u); | |
2435 | ||
9444b1f2 | 2436 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2437 | return 0; |
2438 | ||
a8833944 LP |
2439 | if (u->instance) { |
2440 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2441 | |
a8833944 LP |
2442 | /* Implicitly place all instantiated units in their |
2443 | * own per-template slice */ | |
2444 | ||
7410616c LP |
2445 | r = unit_name_to_prefix(u->id, &prefix); |
2446 | if (r < 0) | |
2447 | return r; | |
a8833944 LP |
2448 | |
2449 | /* The prefix is already escaped, but it might include | |
2450 | * "-" which has a special meaning for slice units, | |
2451 | * hence escape it here extra. */ | |
7410616c | 2452 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2453 | if (!escaped) |
2454 | return -ENOMEM; | |
2455 | ||
463d0d15 | 2456 | if (MANAGER_IS_SYSTEM(u->manager)) |
a8833944 LP |
2457 | b = strjoin("system-", escaped, ".slice", NULL); |
2458 | else | |
2459 | b = strappend(escaped, ".slice"); | |
2460 | if (!b) | |
2461 | return -ENOMEM; | |
2462 | ||
2463 | slice_name = b; | |
2464 | } else | |
2465 | slice_name = | |
463d0d15 | 2466 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2467 | ? SPECIAL_SYSTEM_SLICE |
2468 | : SPECIAL_ROOT_SLICE; | |
2469 | ||
2470 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2471 | if (r < 0) |
2472 | return r; | |
2473 | ||
d79200e2 | 2474 | return unit_set_slice(u, slice); |
a016b922 LP |
2475 | } |
2476 | ||
9444b1f2 LP |
2477 | const char *unit_slice_name(Unit *u) { |
2478 | assert(u); | |
2479 | ||
2480 | if (!UNIT_ISSET(u->slice)) | |
2481 | return NULL; | |
2482 | ||
2483 | return UNIT_DEREF(u->slice)->id; | |
2484 | } | |
2485 | ||
f6ff8c29 | 2486 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2487 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2488 | int r; |
2489 | ||
2490 | assert(u); | |
2491 | assert(type); | |
2492 | assert(_found); | |
2493 | ||
7410616c LP |
2494 | r = unit_name_change_suffix(u->id, type, &t); |
2495 | if (r < 0) | |
2496 | return r; | |
2497 | if (unit_has_name(u, t)) | |
2498 | return -EINVAL; | |
f6ff8c29 | 2499 | |
ac155bb8 | 2500 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2501 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2502 | return r; |
2503 | } | |
2504 | ||
bbc29086 DM |
2505 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2506 | const char *name, *old_owner, *new_owner; | |
2507 | Unit *u = userdata; | |
2508 | int r; | |
2509 | ||
2510 | assert(message); | |
2511 | assert(u); | |
2512 | ||
2513 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2514 | if (r < 0) { | |
2515 | bus_log_parse_error(r); | |
2516 | return 0; | |
2517 | } | |
2518 | ||
2519 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
2520 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
9806e87d LP |
2525 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
2526 | const char *match; | |
bbc29086 | 2527 | |
9806e87d LP |
2528 | assert(u); |
2529 | assert(bus); | |
2530 | assert(name); | |
bbc29086 DM |
2531 | |
2532 | if (u->match_bus_slot) | |
2533 | return -EBUSY; | |
2534 | ||
9806e87d | 2535 | match = strjoina("type='signal'," |
81d62103 ZJS |
2536 | "sender='org.freedesktop.DBus'," |
2537 | "path='/org/freedesktop/DBus'," | |
2538 | "interface='org.freedesktop.DBus'," | |
2539 | "member='NameOwnerChanged'," | |
2540 | "arg0='", name, "'"); | |
bbc29086 DM |
2541 | |
2542 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2543 | } | |
2544 | ||
05e343b7 | 2545 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2546 | int r; |
2547 | ||
05e343b7 LP |
2548 | assert(u); |
2549 | assert(name); | |
2550 | ||
2551 | /* Watch a specific name on the bus. We only support one unit | |
2552 | * watching each name for now. */ | |
2553 | ||
bbc29086 DM |
2554 | if (u->manager->api_bus) { |
2555 | /* If the bus is already available, install the match directly. | |
2556 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 2557 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 2558 | if (r < 0) |
8ea823b6 | 2559 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
2560 | } |
2561 | ||
2562 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2563 | if (r < 0) { | |
2564 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2565 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2566 | } | |
2567 | ||
2568 | return 0; | |
05e343b7 LP |
2569 | } |
2570 | ||
2571 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2572 | assert(u); | |
2573 | assert(name); | |
2574 | ||
ac155bb8 | 2575 | hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2576 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2577 | } |
2578 | ||
a16e1123 LP |
2579 | bool unit_can_serialize(Unit *u) { |
2580 | assert(u); | |
2581 | ||
2582 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2583 | } | |
2584 | ||
6b78f9b4 | 2585 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2586 | int r; |
2587 | ||
2588 | assert(u); | |
2589 | assert(f); | |
2590 | assert(fds); | |
2591 | ||
9bdb98c5 LP |
2592 | if (unit_can_serialize(u)) { |
2593 | ExecRuntime *rt; | |
a16e1123 | 2594 | |
9bdb98c5 | 2595 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2596 | if (r < 0) |
2597 | return r; | |
9bdb98c5 LP |
2598 | |
2599 | rt = unit_get_exec_runtime(u); | |
2600 | if (rt) { | |
f2341e0a | 2601 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2602 | if (r < 0) |
2603 | return r; | |
2604 | } | |
e0209d83 MS |
2605 | } |
2606 | ||
a483fb59 LP |
2607 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
2608 | ||
ac155bb8 MS |
2609 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2610 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2611 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2612 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 2613 | |
ac155bb8 | 2614 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 2615 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2616 | |
ac155bb8 MS |
2617 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2618 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2619 | |
59fccdc5 LP |
2620 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2621 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2622 | ||
c2756a68 | 2623 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 2624 | |
66ebf6c0 | 2625 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
2626 | if (u->cpu_usage_last != NSEC_INFINITY) |
2627 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
2628 | |
2629 | if (u->cgroup_path) | |
2630 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2631 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
c2756a68 | 2632 | |
00d9ef85 LP |
2633 | if (uid_is_valid(u->ref_uid)) |
2634 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
2635 | if (gid_is_valid(u->ref_gid)) | |
2636 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
2637 | ||
05a98afd LP |
2638 | bus_track_serialize(u->bus_track, f, "ref"); |
2639 | ||
613b411c LP |
2640 | if (serialize_jobs) { |
2641 | if (u->job) { | |
2642 | fprintf(f, "job\n"); | |
05a98afd | 2643 | job_serialize(u->job, f); |
613b411c LP |
2644 | } |
2645 | ||
2646 | if (u->nop_job) { | |
2647 | fprintf(f, "job\n"); | |
05a98afd | 2648 | job_serialize(u->nop_job, f); |
613b411c LP |
2649 | } |
2650 | } | |
2651 | ||
a16e1123 LP |
2652 | /* End marker */ |
2653 | fputc('\n', f); | |
2654 | return 0; | |
2655 | } | |
2656 | ||
a34ceba6 LP |
2657 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
2658 | assert(u); | |
2659 | assert(f); | |
2660 | assert(key); | |
2661 | ||
2662 | if (!value) | |
2663 | return 0; | |
2664 | ||
2665 | fputs(key, f); | |
2666 | fputc('=', f); | |
2667 | fputs(value, f); | |
2668 | fputc('\n', f); | |
2669 | ||
2670 | return 1; | |
2671 | } | |
2672 | ||
2673 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
2674 | _cleanup_free_ char *c = NULL; | |
2675 | ||
2676 | assert(u); | |
2677 | assert(f); | |
2678 | assert(key); | |
2679 | ||
2680 | if (!value) | |
2681 | return 0; | |
2682 | ||
2683 | c = cescape(value); | |
2684 | if (!c) | |
2685 | return -ENOMEM; | |
2686 | ||
2687 | fputs(key, f); | |
2688 | fputc('=', f); | |
2689 | fputs(c, f); | |
2690 | fputc('\n', f); | |
2691 | ||
2692 | return 1; | |
2693 | } | |
2694 | ||
2695 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
2696 | int copy; | |
2697 | ||
2698 | assert(u); | |
2699 | assert(f); | |
2700 | assert(key); | |
2701 | ||
2702 | if (fd < 0) | |
2703 | return 0; | |
2704 | ||
2705 | copy = fdset_put_dup(fds, fd); | |
2706 | if (copy < 0) | |
2707 | return copy; | |
2708 | ||
2709 | fprintf(f, "%s=%i\n", key, copy); | |
2710 | return 1; | |
2711 | } | |
2712 | ||
a16e1123 LP |
2713 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
2714 | va_list ap; | |
2715 | ||
2716 | assert(u); | |
2717 | assert(f); | |
2718 | assert(key); | |
2719 | assert(format); | |
2720 | ||
2721 | fputs(key, f); | |
2722 | fputc('=', f); | |
2723 | ||
2724 | va_start(ap, format); | |
2725 | vfprintf(f, format, ap); | |
2726 | va_end(ap); | |
2727 | ||
2728 | fputc('\n', f); | |
2729 | } | |
2730 | ||
a16e1123 | 2731 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2732 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2733 | size_t offset; |
a16e1123 LP |
2734 | int r; |
2735 | ||
2736 | assert(u); | |
2737 | assert(f); | |
2738 | assert(fds); | |
2739 | ||
613b411c LP |
2740 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2741 | if (offset > 0) | |
2742 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2743 | ||
a16e1123 | 2744 | for (;;) { |
20c03b7b | 2745 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2746 | size_t k; |
2747 | ||
2748 | if (!fgets(line, sizeof(line), f)) { | |
2749 | if (feof(f)) | |
2750 | return 0; | |
2751 | return -errno; | |
2752 | } | |
2753 | ||
10f8e83c | 2754 | char_array_0(line); |
a16e1123 LP |
2755 | l = strstrip(line); |
2756 | ||
2757 | /* End marker */ | |
e911de99 | 2758 | if (isempty(l)) |
a483fb59 | 2759 | break; |
a16e1123 LP |
2760 | |
2761 | k = strcspn(l, "="); | |
2762 | ||
2763 | if (l[k] == '=') { | |
2764 | l[k] = 0; | |
2765 | v = l+k+1; | |
2766 | } else | |
2767 | v = l+k; | |
2768 | ||
cca098b0 | 2769 | if (streq(l, "job")) { |
39a18c60 MS |
2770 | if (v[0] == '\0') { |
2771 | /* new-style serialized job */ | |
9c3349e2 LP |
2772 | Job *j; |
2773 | ||
2774 | j = job_new_raw(u); | |
39a18c60 | 2775 | if (!j) |
e911de99 | 2776 | return log_oom(); |
39a18c60 | 2777 | |
05a98afd | 2778 | r = job_deserialize(j, f); |
39a18c60 MS |
2779 | if (r < 0) { |
2780 | job_free(j); | |
2781 | return r; | |
2782 | } | |
cca098b0 | 2783 | |
39a18c60 MS |
2784 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2785 | if (r < 0) { | |
2786 | job_free(j); | |
2787 | return r; | |
2788 | } | |
e0209d83 MS |
2789 | |
2790 | r = job_install_deserialized(j); | |
2791 | if (r < 0) { | |
2792 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2793 | job_free(j); | |
2794 | return r; | |
2795 | } | |
ed10fa8c LP |
2796 | } else /* legacy for pre-44 */ |
2797 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2798 | continue; |
a483fb59 LP |
2799 | } else if (streq(l, "state-change-timestamp")) { |
2800 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
2801 | continue; | |
8aaf019b | 2802 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2803 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2804 | continue; |
2805 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2806 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2807 | continue; |
2808 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2809 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2810 | continue; |
2811 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2812 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2813 | continue; |
2791a8f8 | 2814 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2815 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2816 | continue; |
59fccdc5 LP |
2817 | } else if (streq(l, "assert-timestamp")) { |
2818 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2819 | continue; | |
2791a8f8 | 2820 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2821 | |
e911de99 LP |
2822 | r = parse_boolean(v); |
2823 | if (r < 0) | |
f2341e0a | 2824 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2825 | else |
e911de99 | 2826 | u->condition_result = r; |
efbac6d2 LP |
2827 | |
2828 | continue; | |
c2756a68 | 2829 | |
59fccdc5 | 2830 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2831 | |
e911de99 LP |
2832 | r = parse_boolean(v); |
2833 | if (r < 0) | |
f2341e0a | 2834 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2835 | else |
e911de99 | 2836 | u->assert_result = r; |
59fccdc5 LP |
2837 | |
2838 | continue; | |
2839 | ||
c2756a68 | 2840 | } else if (streq(l, "transient")) { |
c2756a68 | 2841 | |
e911de99 LP |
2842 | r = parse_boolean(v); |
2843 | if (r < 0) | |
f2341e0a | 2844 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2845 | else |
e911de99 | 2846 | u->transient = r; |
c2756a68 LP |
2847 | |
2848 | continue; | |
e911de99 | 2849 | |
fe700f46 | 2850 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 2851 | |
66ebf6c0 | 2852 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 2853 | if (r < 0) |
fe700f46 LP |
2854 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
2855 | ||
2856 | continue; | |
2857 | ||
2858 | } else if (streq(l, "cpu-usage-last")) { | |
2859 | ||
2860 | r = safe_atou64(v, &u->cpu_usage_last); | |
2861 | if (r < 0) | |
2862 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 2863 | |
0f908397 | 2864 | continue; |
4e595329 | 2865 | |
e911de99 | 2866 | } else if (streq(l, "cgroup")) { |
72673e86 | 2867 | |
e911de99 LP |
2868 | r = unit_set_cgroup_path(u, v); |
2869 | if (r < 0) | |
f2341e0a | 2870 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2871 | |
efdb0237 LP |
2872 | (void) unit_watch_cgroup(u); |
2873 | ||
de1d4f9b WF |
2874 | continue; |
2875 | } else if (streq(l, "cgroup-realized")) { | |
2876 | int b; | |
2877 | ||
2878 | b = parse_boolean(v); | |
2879 | if (b < 0) | |
2880 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2881 | else | |
2882 | u->cgroup_realized = b; | |
2883 | ||
c2756a68 | 2884 | continue; |
00d9ef85 LP |
2885 | |
2886 | } else if (streq(l, "ref-uid")) { | |
2887 | uid_t uid; | |
2888 | ||
2889 | r = parse_uid(v, &uid); | |
2890 | if (r < 0) | |
2891 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
2892 | else | |
2893 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
2894 | ||
2895 | continue; | |
2896 | ||
2897 | } else if (streq(l, "ref-gid")) { | |
2898 | gid_t gid; | |
2899 | ||
2900 | r = parse_gid(v, &gid); | |
2901 | if (r < 0) | |
2902 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
2903 | else | |
2904 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
2905 | ||
05a98afd LP |
2906 | } else if (streq(l, "ref")) { |
2907 | ||
2908 | r = strv_extend(&u->deserialized_refs, v); | |
2909 | if (r < 0) | |
2910 | log_oom(); | |
2911 | ||
00d9ef85 | 2912 | continue; |
8aaf019b | 2913 | } |
cca098b0 | 2914 | |
9bdb98c5 LP |
2915 | if (unit_can_serialize(u)) { |
2916 | if (rt) { | |
f2341e0a | 2917 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2918 | if (r < 0) { |
f2341e0a | 2919 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2920 | continue; |
2921 | } | |
2922 | ||
2923 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2924 | if (r > 0) |
2925 | continue; | |
2926 | } | |
2927 | ||
2928 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2929 | if (r < 0) |
f2341e0a | 2930 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2931 | } |
a16e1123 | 2932 | } |
a483fb59 LP |
2933 | |
2934 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
2935 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 2936 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
2937 | |
2938 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
2939 | dual_timestamp_get(&u->state_change_timestamp); | |
2940 | ||
2941 | return 0; | |
a16e1123 LP |
2942 | } |
2943 | ||
9d06297e | 2944 | int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency dep) { |
6e2ef85b | 2945 | Unit *device; |
68eda4bd | 2946 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2947 | int r; |
2948 | ||
2949 | assert(u); | |
2950 | ||
6e2ef85b | 2951 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2952 | if (isempty(what)) |
2953 | return 0; | |
6e2ef85b | 2954 | |
8407a5d0 | 2955 | if (!is_device_path(what)) |
6e2ef85b LP |
2956 | return 0; |
2957 | ||
47bc12e1 LP |
2958 | /* When device units aren't supported (such as in a |
2959 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2960 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2961 | return 0; |
2962 | ||
7410616c LP |
2963 | r = unit_name_from_path(what, ".device", &e); |
2964 | if (r < 0) | |
2965 | return r; | |
6e2ef85b | 2966 | |
ac155bb8 | 2967 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2968 | if (r < 0) |
2969 | return r; | |
2970 | ||
9d06297e | 2971 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 2972 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
9d06297e | 2973 | device, true); |
faa368e3 | 2974 | if (r < 0) |
6e2ef85b LP |
2975 | return r; |
2976 | ||
faa368e3 LP |
2977 | if (wants) { |
2978 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2979 | if (r < 0) | |
6e2ef85b | 2980 | return r; |
faa368e3 | 2981 | } |
6e2ef85b LP |
2982 | |
2983 | return 0; | |
2984 | } | |
a16e1123 | 2985 | |
be847e82 | 2986 | int unit_coldplug(Unit *u) { |
05a98afd LP |
2987 | int r = 0, q; |
2988 | char **i; | |
cca098b0 LP |
2989 | |
2990 | assert(u); | |
2991 | ||
f78f265f LP |
2992 | /* Make sure we don't enter a loop, when coldplugging |
2993 | * recursively. */ | |
2994 | if (u->coldplugged) | |
2995 | return 0; | |
2996 | ||
2997 | u->coldplugged = true; | |
2998 | ||
05a98afd LP |
2999 | STRV_FOREACH(i, u->deserialized_refs) { |
3000 | q = bus_unit_track_add_name(u, *i); | |
3001 | if (q < 0 && r >= 0) | |
3002 | r = q; | |
3003 | } | |
3004 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3005 | |
05a98afd LP |
3006 | if (UNIT_VTABLE(u)->coldplug) { |
3007 | q = UNIT_VTABLE(u)->coldplug(u); | |
3008 | if (q < 0 && r >= 0) | |
3009 | r = q; | |
3010 | } | |
5a6158b6 | 3011 | |
05a98afd LP |
3012 | if (u->job) { |
3013 | q = job_coldplug(u->job); | |
3014 | if (q < 0 && r >= 0) | |
3015 | r = q; | |
3016 | } | |
cca098b0 | 3017 | |
05a98afd | 3018 | return r; |
cca098b0 LP |
3019 | } |
3020 | ||
87ec20ef | 3021 | static bool fragment_mtime_newer(const char *path, usec_t mtime) { |
21b95806 ZJS |
3022 | struct stat st; |
3023 | ||
3024 | if (!path) | |
3025 | return false; | |
3026 | ||
3027 | if (stat(path, &st) < 0) | |
3028 | /* What, cannot access this anymore? */ | |
3029 | return true; | |
3030 | ||
3a8db9fe ZJS |
3031 | if (mtime > 0) |
3032 | /* For non-empty files check the mtime */ | |
87ec20ef | 3033 | return timespec_load(&st.st_mtim) > mtime; |
3a8db9fe ZJS |
3034 | else if (!null_or_empty(&st)) |
3035 | /* For masked files check if they are still so */ | |
21b95806 ZJS |
3036 | return true; |
3037 | ||
3038 | return false; | |
3039 | } | |
3040 | ||
45fb0699 | 3041 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3042 | _cleanup_strv_free_ char **t = NULL; |
3043 | char **path; | |
1b64d026 | 3044 | |
45fb0699 LP |
3045 | assert(u); |
3046 | ||
ab932a62 | 3047 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime)) |
21b95806 | 3048 | return true; |
5f4b19f4 | 3049 | |
ab932a62 LP |
3050 | if (fragment_mtime_newer(u->source_path, u->source_mtime)) |
3051 | return true; | |
ae7a7182 | 3052 | |
ab932a62 LP |
3053 | (void) unit_find_dropin_paths(u, &t); |
3054 | if (!strv_equal(u->dropin_paths, t)) | |
3055 | return true; | |
6d10d308 | 3056 | |
ab932a62 LP |
3057 | STRV_FOREACH(path, u->dropin_paths) |
3058 | if (fragment_mtime_newer(*path, u->dropin_mtime)) | |
3059 | return true; | |
21b95806 | 3060 | |
ab932a62 | 3061 | return false; |
45fb0699 LP |
3062 | } |
3063 | ||
fdf20a31 | 3064 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3065 | assert(u); |
3066 | ||
fdf20a31 MM |
3067 | if (UNIT_VTABLE(u)->reset_failed) |
3068 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3069 | |
3070 | RATELIMIT_RESET(u->start_limit); | |
3071 | u->start_limit_hit = false; | |
5632e374 LP |
3072 | } |
3073 | ||
a7f241db LP |
3074 | Unit *unit_following(Unit *u) { |
3075 | assert(u); | |
3076 | ||
3077 | if (UNIT_VTABLE(u)->following) | |
3078 | return UNIT_VTABLE(u)->following(u); | |
3079 | ||
3080 | return NULL; | |
3081 | } | |
3082 | ||
31afa0a4 | 3083 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3084 | assert(u); |
3085 | ||
31afa0a4 LP |
3086 | /* This call does check the current state of the unit. It's |
3087 | * hence useful to be called from state change calls of the | |
3088 | * unit itself, where the state isn't updated yet. This is | |
3089 | * different from unit_inactive_or_pending() which checks both | |
3090 | * the current state and for a queued job. */ | |
18ffdfda | 3091 | |
31afa0a4 LP |
3092 | return u->job && u->job->type == JOB_STOP; |
3093 | } | |
3094 | ||
3095 | bool unit_inactive_or_pending(Unit *u) { | |
3096 | assert(u); | |
3097 | ||
3098 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3099 | |
d956ac29 LP |
3100 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3101 | return true; | |
3102 | ||
31afa0a4 | 3103 | if (unit_stop_pending(u)) |
18ffdfda LP |
3104 | return true; |
3105 | ||
3106 | return false; | |
3107 | } | |
3108 | ||
31afa0a4 | 3109 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3110 | assert(u); |
3111 | ||
f60c2665 | 3112 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3113 | |
3114 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3115 | return true; | |
3116 | ||
ac155bb8 MS |
3117 | if (u->job && |
3118 | (u->job->type == JOB_START || | |
3119 | u->job->type == JOB_RELOAD_OR_START || | |
3120 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3121 | return true; |
3122 | ||
3123 | return false; | |
3124 | } | |
3125 | ||
718db961 | 3126 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3127 | assert(u); |
3128 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3129 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3130 | |
8a0867d6 | 3131 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3132 | return -EOPNOTSUPP; |
8a0867d6 | 3133 | |
c74f17d9 | 3134 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3135 | } |
3136 | ||
82659fd7 LP |
3137 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3138 | Set *pid_set; | |
3139 | int r; | |
3140 | ||
d5099efc | 3141 | pid_set = set_new(NULL); |
82659fd7 LP |
3142 | if (!pid_set) |
3143 | return NULL; | |
3144 | ||
3145 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3146 | if (main_pid > 0) { | |
fea72cc0 | 3147 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3148 | if (r < 0) |
3149 | goto fail; | |
3150 | } | |
3151 | ||
3152 | if (control_pid > 0) { | |
fea72cc0 | 3153 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3154 | if (r < 0) |
3155 | goto fail; | |
3156 | } | |
3157 | ||
3158 | return pid_set; | |
3159 | ||
3160 | fail: | |
3161 | set_free(pid_set); | |
3162 | return NULL; | |
3163 | } | |
3164 | ||
d91c34f2 LP |
3165 | int unit_kill_common( |
3166 | Unit *u, | |
3167 | KillWho who, | |
3168 | int signo, | |
3169 | pid_t main_pid, | |
3170 | pid_t control_pid, | |
718db961 | 3171 | sd_bus_error *error) { |
d91c34f2 | 3172 | |
814cc562 | 3173 | int r = 0; |
ac5e3a50 | 3174 | bool killed = false; |
814cc562 | 3175 | |
ac5e3a50 | 3176 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3177 | if (main_pid < 0) |
7358dc02 | 3178 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3179 | else if (main_pid == 0) |
7358dc02 | 3180 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3181 | } |
3182 | ||
ac5e3a50 | 3183 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3184 | if (control_pid < 0) |
7358dc02 | 3185 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3186 | else if (control_pid == 0) |
7358dc02 | 3187 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3188 | } |
3189 | ||
ac5e3a50 JS |
3190 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3191 | if (control_pid > 0) { | |
814cc562 MS |
3192 | if (kill(control_pid, signo) < 0) |
3193 | r = -errno; | |
ac5e3a50 JS |
3194 | else |
3195 | killed = true; | |
3196 | } | |
814cc562 | 3197 | |
ac5e3a50 JS |
3198 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3199 | if (main_pid > 0) { | |
814cc562 MS |
3200 | if (kill(main_pid, signo) < 0) |
3201 | r = -errno; | |
ac5e3a50 JS |
3202 | else |
3203 | killed = true; | |
3204 | } | |
814cc562 | 3205 | |
ac5e3a50 | 3206 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3207 | _cleanup_set_free_ Set *pid_set = NULL; |
3208 | int q; | |
3209 | ||
82659fd7 LP |
3210 | /* Exclude the main/control pids from being killed via the cgroup */ |
3211 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3212 | if (!pid_set) |
3213 | return -ENOMEM; | |
3214 | ||
1d98fef1 | 3215 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
814cc562 MS |
3216 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3217 | r = q; | |
ac5e3a50 JS |
3218 | else |
3219 | killed = true; | |
814cc562 MS |
3220 | } |
3221 | ||
201f0c91 | 3222 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3223 | return -ESRCH; |
3224 | ||
814cc562 MS |
3225 | return r; |
3226 | } | |
3227 | ||
6210e7fc LP |
3228 | int unit_following_set(Unit *u, Set **s) { |
3229 | assert(u); | |
3230 | assert(s); | |
3231 | ||
3232 | if (UNIT_VTABLE(u)->following_set) | |
3233 | return UNIT_VTABLE(u)->following_set(u, s); | |
3234 | ||
3235 | *s = NULL; | |
3236 | return 0; | |
3237 | } | |
3238 | ||
a4375746 | 3239 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3240 | int r; |
3241 | ||
a4375746 LP |
3242 | assert(u); |
3243 | ||
0ec0deaa LP |
3244 | if (u->unit_file_state < 0 && u->fragment_path) { |
3245 | r = unit_file_get_state( | |
463d0d15 | 3246 | u->manager->unit_file_scope, |
0ec0deaa LP |
3247 | NULL, |
3248 | basename(u->fragment_path), | |
3249 | &u->unit_file_state); | |
3250 | if (r < 0) | |
3251 | u->unit_file_state = UNIT_FILE_BAD; | |
3252 | } | |
a4375746 | 3253 | |
ac155bb8 | 3254 | return u->unit_file_state; |
a4375746 LP |
3255 | } |
3256 | ||
d2dc52db LP |
3257 | int unit_get_unit_file_preset(Unit *u) { |
3258 | assert(u); | |
3259 | ||
3260 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3261 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3262 | u->manager->unit_file_scope, |
0ec0deaa LP |
3263 | NULL, |
3264 | basename(u->fragment_path)); | |
d2dc52db LP |
3265 | |
3266 | return u->unit_file_preset; | |
3267 | } | |
3268 | ||
57020a3a LP |
3269 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3270 | assert(ref); | |
3271 | assert(u); | |
3272 | ||
3273 | if (ref->unit) | |
3274 | unit_ref_unset(ref); | |
3275 | ||
3276 | ref->unit = u; | |
71fda00f | 3277 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3278 | return u; |
3279 | } | |
3280 | ||
3281 | void unit_ref_unset(UnitRef *ref) { | |
3282 | assert(ref); | |
3283 | ||
3284 | if (!ref->unit) | |
3285 | return; | |
3286 | ||
b75102e5 LP |
3287 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3288 | * be unreferenced now. */ | |
3289 | unit_add_to_gc_queue(ref->unit); | |
3290 | ||
71fda00f | 3291 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3292 | ref->unit = NULL; |
3293 | } | |
3294 | ||
29206d46 LP |
3295 | static int user_from_unit_name(Unit *u, char **ret) { |
3296 | ||
3297 | static const uint8_t hash_key[] = { | |
3298 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3299 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3300 | }; | |
3301 | ||
3302 | _cleanup_free_ char *n = NULL; | |
3303 | int r; | |
3304 | ||
3305 | r = unit_name_to_prefix(u->id, &n); | |
3306 | if (r < 0) | |
3307 | return r; | |
3308 | ||
3309 | if (valid_user_group_name(n)) { | |
3310 | *ret = n; | |
3311 | n = NULL; | |
3312 | return 0; | |
3313 | } | |
3314 | ||
3315 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3316 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3317 | return -ENOMEM; | |
3318 | ||
3319 | return 0; | |
3320 | } | |
3321 | ||
598459ce LP |
3322 | int unit_patch_contexts(Unit *u) { |
3323 | CGroupContext *cc; | |
3324 | ExecContext *ec; | |
cba6e062 LP |
3325 | unsigned i; |
3326 | int r; | |
3327 | ||
e06c73cc | 3328 | assert(u); |
e06c73cc | 3329 | |
598459ce LP |
3330 | /* Patch in the manager defaults into the exec and cgroup |
3331 | * contexts, _after_ the rest of the settings have been | |
3332 | * initialized */ | |
085afe36 | 3333 | |
598459ce LP |
3334 | ec = unit_get_exec_context(u); |
3335 | if (ec) { | |
3336 | /* This only copies in the ones that need memory */ | |
3337 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3338 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3339 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3340 | if (!ec->rlimit[i]) | |
3341 | return -ENOMEM; | |
3342 | } | |
3343 | ||
463d0d15 | 3344 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3345 | !ec->working_directory) { |
3346 | ||
3347 | r = get_home_dir(&ec->working_directory); | |
3348 | if (r < 0) | |
3349 | return r; | |
4c08c824 LP |
3350 | |
3351 | /* Allow user services to run, even if the | |
3352 | * home directory is missing */ | |
3353 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3354 | } |
3355 | ||
463d0d15 | 3356 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3357 | (ec->syscall_whitelist || |
3358 | !set_isempty(ec->syscall_filter) || | |
3359 | !set_isempty(ec->syscall_archs) || | |
3360 | ec->address_families_whitelist || | |
3361 | !set_isempty(ec->address_families))) | |
3362 | ec->no_new_privileges = true; | |
e06c73cc | 3363 | |
598459ce | 3364 | if (ec->private_devices) |
a103496c | 3365 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_MKNOD); |
29206d46 LP |
3366 | |
3367 | if (ec->dynamic_user) { | |
3368 | if (!ec->user) { | |
3369 | r = user_from_unit_name(u, &ec->user); | |
3370 | if (r < 0) | |
3371 | return r; | |
3372 | } | |
3373 | ||
3374 | if (!ec->group) { | |
3375 | ec->group = strdup(ec->user); | |
3376 | if (!ec->group) | |
3377 | return -ENOMEM; | |
3378 | } | |
3379 | ||
3380 | ec->private_tmp = true; | |
00d9ef85 | 3381 | ec->remove_ipc = true; |
29206d46 | 3382 | } |
cba6e062 LP |
3383 | } |
3384 | ||
598459ce LP |
3385 | cc = unit_get_cgroup_context(u); |
3386 | if (cc) { | |
f513e420 | 3387 | |
598459ce LP |
3388 | if (ec && |
3389 | ec->private_devices && | |
3390 | cc->device_policy == CGROUP_AUTO) | |
3391 | cc->device_policy = CGROUP_CLOSED; | |
3392 | } | |
f1660f96 | 3393 | |
cba6e062 | 3394 | return 0; |
e06c73cc LP |
3395 | } |
3396 | ||
3ef63c31 LP |
3397 | ExecContext *unit_get_exec_context(Unit *u) { |
3398 | size_t offset; | |
3399 | assert(u); | |
3400 | ||
598459ce LP |
3401 | if (u->type < 0) |
3402 | return NULL; | |
3403 | ||
3ef63c31 LP |
3404 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3405 | if (offset <= 0) | |
3406 | return NULL; | |
3407 | ||
3408 | return (ExecContext*) ((uint8_t*) u + offset); | |
3409 | } | |
3410 | ||
718db961 LP |
3411 | KillContext *unit_get_kill_context(Unit *u) { |
3412 | size_t offset; | |
3413 | assert(u); | |
3414 | ||
598459ce LP |
3415 | if (u->type < 0) |
3416 | return NULL; | |
3417 | ||
718db961 LP |
3418 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3419 | if (offset <= 0) | |
3420 | return NULL; | |
3421 | ||
3422 | return (KillContext*) ((uint8_t*) u + offset); | |
3423 | } | |
3424 | ||
4ad49000 LP |
3425 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3426 | size_t offset; | |
3427 | ||
598459ce LP |
3428 | if (u->type < 0) |
3429 | return NULL; | |
3430 | ||
4ad49000 LP |
3431 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3432 | if (offset <= 0) | |
3433 | return NULL; | |
3434 | ||
3435 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3436 | } | |
3437 | ||
613b411c LP |
3438 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3439 | size_t offset; | |
3440 | ||
598459ce LP |
3441 | if (u->type < 0) |
3442 | return NULL; | |
3443 | ||
613b411c LP |
3444 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3445 | if (offset <= 0) | |
3446 | return NULL; | |
3447 | ||
3448 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3449 | } | |
3450 | ||
39591351 | 3451 | static const char* unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode) { |
3f5e8115 LP |
3452 | assert(u); |
3453 | ||
4f4afc88 LP |
3454 | if (!IN_SET(mode, UNIT_RUNTIME, UNIT_PERSISTENT)) |
3455 | return NULL; | |
3456 | ||
39591351 LP |
3457 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
3458 | return u->manager->lookup_paths.transient; | |
26d04f86 | 3459 | |
39591351 | 3460 | if (mode == UNIT_RUNTIME) |
4f4afc88 | 3461 | return u->manager->lookup_paths.runtime_control; |
3f5e8115 | 3462 | |
39591351 | 3463 | if (mode == UNIT_PERSISTENT) |
4f4afc88 | 3464 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 3465 | |
39591351 | 3466 | return NULL; |
71645aca LP |
3467 | } |
3468 | ||
8e2af478 | 3469 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
39591351 | 3470 | _cleanup_free_ char *p = NULL, *q = NULL; |
2a9a6f8a | 3471 | const char *dir, *wrapped; |
26d04f86 | 3472 | int r; |
71645aca LP |
3473 | |
3474 | assert(u); | |
3475 | ||
4f4afc88 LP |
3476 | if (u->transient_file) { |
3477 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
3478 | * write to the transient unit file. */ | |
3479 | fputs(data, u->transient_file); | |
fc40065b | 3480 | fputc('\n', u->transient_file); |
4f4afc88 LP |
3481 | return 0; |
3482 | } | |
3483 | ||
6d235724 | 3484 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3485 | return 0; |
3486 | ||
39591351 LP |
3487 | dir = unit_drop_in_dir(u, mode); |
3488 | if (!dir) | |
3489 | return -EINVAL; | |
71645aca | 3490 | |
2a9a6f8a | 3491 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 3492 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
3493 | data, |
3494 | "\n"); | |
e20b2a86 | 3495 | |
815b09d3 | 3496 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
3497 | if (r < 0) |
3498 | return r; | |
3499 | ||
815b09d3 | 3500 | (void) mkdir_p(p, 0755); |
2a9a6f8a | 3501 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
3502 | if (r < 0) |
3503 | return r; | |
3504 | ||
815b09d3 | 3505 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
3506 | if (r < 0) |
3507 | return r; | |
815b09d3 | 3508 | q = NULL; |
adb76a70 | 3509 | |
adb76a70 WC |
3510 | strv_uniq(u->dropin_paths); |
3511 | ||
3512 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3513 | ||
3514 | return 0; | |
26d04f86 | 3515 | } |
71645aca | 3516 | |
b9ec9359 LP |
3517 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3518 | _cleanup_free_ char *p = NULL; | |
3519 | va_list ap; | |
3520 | int r; | |
3521 | ||
3522 | assert(u); | |
3523 | assert(name); | |
3524 | assert(format); | |
3525 | ||
6d235724 | 3526 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3527 | return 0; |
3528 | ||
3529 | va_start(ap, format); | |
3530 | r = vasprintf(&p, format, ap); | |
3531 | va_end(ap); | |
3532 | ||
3533 | if (r < 0) | |
3534 | return -ENOMEM; | |
3535 | ||
3536 | return unit_write_drop_in(u, mode, name, p); | |
3537 | } | |
3538 | ||
3539 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
39591351 | 3540 | const char *ndata; |
b42defe3 LP |
3541 | |
3542 | assert(u); | |
3543 | assert(name); | |
3544 | assert(data); | |
3545 | ||
3546 | if (!UNIT_VTABLE(u)->private_section) | |
3547 | return -EINVAL; | |
3548 | ||
6d235724 | 3549 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3550 | return 0; |
3551 | ||
81d62103 | 3552 | ndata = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); |
b42defe3 LP |
3553 | |
3554 | return unit_write_drop_in(u, mode, name, ndata); | |
3555 | } | |
3556 | ||
b9ec9359 LP |
3557 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3558 | _cleanup_free_ char *p = NULL; | |
3559 | va_list ap; | |
3560 | int r; | |
3561 | ||
3562 | assert(u); | |
3563 | assert(name); | |
3564 | assert(format); | |
3565 | ||
6d235724 | 3566 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3567 | return 0; |
3568 | ||
3569 | va_start(ap, format); | |
3570 | r = vasprintf(&p, format, ap); | |
3571 | va_end(ap); | |
3572 | ||
3573 | if (r < 0) | |
3574 | return -ENOMEM; | |
3575 | ||
3576 | return unit_write_drop_in_private(u, mode, name, p); | |
3577 | } | |
71645aca | 3578 | |
c2756a68 | 3579 | int unit_make_transient(Unit *u) { |
4f4afc88 LP |
3580 | FILE *f; |
3581 | char *path; | |
3582 | ||
c2756a68 LP |
3583 | assert(u); |
3584 | ||
3f5e8115 LP |
3585 | if (!UNIT_VTABLE(u)->can_transient) |
3586 | return -EOPNOTSUPP; | |
3587 | ||
4f4afc88 LP |
3588 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id, NULL); |
3589 | if (!path) | |
3590 | return -ENOMEM; | |
3591 | ||
3592 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
3593 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
3594 | ||
78e334b5 | 3595 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 3596 | f = fopen(path, "we"); |
78e334b5 ZJS |
3597 | if (!f) { |
3598 | free(path); | |
3599 | return -errno; | |
3600 | } | |
4f4afc88 LP |
3601 | } |
3602 | ||
3603 | if (u->transient_file) | |
3604 | fclose(u->transient_file); | |
3605 | u->transient_file = f; | |
3606 | ||
3607 | free(u->fragment_path); | |
3608 | u->fragment_path = path; | |
7c65093a | 3609 | |
7c65093a LP |
3610 | u->source_path = mfree(u->source_path); |
3611 | u->dropin_paths = strv_free(u->dropin_paths); | |
3612 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
3613 | ||
4f4afc88 LP |
3614 | u->load_state = UNIT_STUB; |
3615 | u->load_error = 0; | |
3616 | u->transient = true; | |
3617 | ||
7c65093a LP |
3618 | unit_add_to_dbus_queue(u); |
3619 | unit_add_to_gc_queue(u); | |
c2756a68 | 3620 | |
4f4afc88 LP |
3621 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
3622 | u->transient_file); | |
3623 | ||
3f5e8115 | 3624 | return 0; |
c2756a68 LP |
3625 | } |
3626 | ||
1d98fef1 LP |
3627 | static void log_kill(pid_t pid, int sig, void *userdata) { |
3628 | _cleanup_free_ char *comm = NULL; | |
3629 | ||
3630 | (void) get_process_comm(pid, &comm); | |
3631 | ||
3632 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
3633 | only, like for example systemd's own PAM stub process. */ | |
3634 | if (comm && comm[0] == '(') | |
3635 | return; | |
3636 | ||
3637 | log_unit_notice(userdata, | |
3638 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
3639 | pid, | |
3640 | strna(comm), | |
3641 | signal_to_string(sig)); | |
3642 | } | |
3643 | ||
3644 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
3645 | assert(c); | |
3646 | ||
3647 | switch (k) { | |
3648 | ||
3649 | case KILL_TERMINATE: | |
3650 | case KILL_TERMINATE_AND_LOG: | |
3651 | return c->kill_signal; | |
3652 | ||
3653 | case KILL_KILL: | |
3654 | return SIGKILL; | |
3655 | ||
3656 | case KILL_ABORT: | |
3657 | return SIGABRT; | |
3658 | ||
3659 | default: | |
3660 | assert_not_reached("KillOperation unknown"); | |
3661 | } | |
3662 | } | |
3663 | ||
cd2086fe LP |
3664 | int unit_kill_context( |
3665 | Unit *u, | |
3666 | KillContext *c, | |
db2cb23b | 3667 | KillOperation k, |
cd2086fe LP |
3668 | pid_t main_pid, |
3669 | pid_t control_pid, | |
3670 | bool main_pid_alien) { | |
3671 | ||
1d98fef1 LP |
3672 | bool wait_for_exit = false, send_sighup; |
3673 | cg_kill_log_func_t log_func; | |
b821a397 | 3674 | int sig, r; |
cd2086fe LP |
3675 | |
3676 | assert(u); | |
3677 | assert(c); | |
3678 | ||
1d98fef1 LP |
3679 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 if we |
3680 | * killed something worth waiting for, 0 otherwise. */ | |
3681 | ||
cd2086fe LP |
3682 | if (c->kill_mode == KILL_NONE) |
3683 | return 0; | |
3684 | ||
1d98fef1 LP |
3685 | sig = operation_to_signal(c, k); |
3686 | ||
3687 | send_sighup = | |
3688 | c->send_sighup && | |
3689 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
3690 | sig != SIGHUP; | |
3691 | ||
3692 | log_func = | |
3693 | k != KILL_TERMINATE || | |
3694 | IN_SET(sig, SIGKILL, SIGABRT) ? log_kill : NULL; | |
cd2086fe LP |
3695 | |
3696 | if (main_pid > 0) { | |
1d98fef1 LP |
3697 | if (log_func) |
3698 | log_func(main_pid, sig, u); | |
cd2086fe | 3699 | |
1d98fef1 | 3700 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
3701 | if (r < 0 && r != -ESRCH) { |
3702 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 3703 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 3704 | |
b821a397 | 3705 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 3706 | } else { |
bc6aed7b LP |
3707 | if (!main_pid_alien) |
3708 | wait_for_exit = true; | |
82659fd7 | 3709 | |
1d98fef1 | 3710 | if (r != -ESRCH && send_sighup) |
d0667321 | 3711 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 3712 | } |
cd2086fe LP |
3713 | } |
3714 | ||
3715 | if (control_pid > 0) { | |
1d98fef1 LP |
3716 | if (log_func) |
3717 | log_func(control_pid, sig, u); | |
cd2086fe | 3718 | |
1d98fef1 | 3719 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
3720 | if (r < 0 && r != -ESRCH) { |
3721 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 3722 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 3723 | |
b821a397 | 3724 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 3725 | } else { |
cd2086fe | 3726 | wait_for_exit = true; |
82659fd7 | 3727 | |
1d98fef1 | 3728 | if (r != -ESRCH && send_sighup) |
d0667321 | 3729 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 3730 | } |
cd2086fe LP |
3731 | } |
3732 | ||
b821a397 LP |
3733 | if (u->cgroup_path && |
3734 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
3735 | _cleanup_set_free_ Set *pid_set = NULL; |
3736 | ||
82659fd7 LP |
3737 | /* Exclude the main/control pids from being killed via the cgroup */ |
3738 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3739 | if (!pid_set) |
3740 | return -ENOMEM; | |
3741 | ||
1d98fef1 LP |
3742 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
3743 | sig, | |
3744 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
3745 | pid_set, | |
3746 | log_func, u); | |
cd2086fe LP |
3747 | if (r < 0) { |
3748 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
b821a397 LP |
3749 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
3750 | ||
82659fd7 | 3751 | } else if (r > 0) { |
bc6aed7b | 3752 | |
efdb0237 LP |
3753 | /* FIXME: For now, on the legacy hierarchy, we |
3754 | * will not wait for the cgroup members to die | |
3755 | * if we are running in a container or if this | |
3756 | * is a delegation unit, simply because cgroup | |
3757 | * notification is unreliable in these | |
3758 | * cases. It doesn't work at all in | |
3759 | * containers, and outside of containers it | |
3760 | * can be confused easily by left-over | |
ccddd104 | 3761 | * directories in the cgroup — which however |
efdb0237 LP |
3762 | * should not exist in non-delegated units. On |
3763 | * the unified hierarchy that's different, | |
3764 | * there we get proper events. Hence rely on | |
3765 | * them.*/ | |
3766 | ||
5da38d07 | 3767 | if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
75f86906 | 3768 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 3769 | wait_for_exit = true; |
58ea275a | 3770 | |
1d98fef1 | 3771 | if (send_sighup) { |
82659fd7 LP |
3772 | set_free(pid_set); |
3773 | ||
3774 | pid_set = unit_pid_set(main_pid, control_pid); | |
3775 | if (!pid_set) | |
3776 | return -ENOMEM; | |
3777 | ||
1d98fef1 LP |
3778 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
3779 | SIGHUP, | |
3780 | CGROUP_IGNORE_SELF, | |
3781 | pid_set, | |
3782 | NULL, NULL); | |
82659fd7 LP |
3783 | } |
3784 | } | |
cd2086fe LP |
3785 | } |
3786 | ||
3787 | return wait_for_exit; | |
3788 | } | |
3789 | ||
a57f7e2c LP |
3790 | int unit_require_mounts_for(Unit *u, const char *path) { |
3791 | char prefix[strlen(path) + 1], *p; | |
3792 | int r; | |
3793 | ||
3794 | assert(u); | |
3795 | assert(path); | |
3796 | ||
3797 | /* Registers a unit for requiring a certain path and all its | |
3798 | * prefixes. We keep a simple array of these paths in the | |
3799 | * unit, since its usually short. However, we build a prefix | |
3800 | * table for all possible prefixes so that new appearing mount | |
3801 | * units can easily determine which units to make themselves a | |
3802 | * dependency of. */ | |
3803 | ||
70b64bd3 ZJS |
3804 | if (!path_is_absolute(path)) |
3805 | return -EINVAL; | |
3806 | ||
a57f7e2c LP |
3807 | p = strdup(path); |
3808 | if (!p) | |
3809 | return -ENOMEM; | |
3810 | ||
3811 | path_kill_slashes(p); | |
3812 | ||
a57f7e2c LP |
3813 | if (!path_is_safe(p)) { |
3814 | free(p); | |
3815 | return -EPERM; | |
3816 | } | |
3817 | ||
3818 | if (strv_contains(u->requires_mounts_for, p)) { | |
3819 | free(p); | |
3820 | return 0; | |
3821 | } | |
3822 | ||
6e18964d ZJS |
3823 | r = strv_consume(&u->requires_mounts_for, p); |
3824 | if (r < 0) | |
a57f7e2c | 3825 | return r; |
a57f7e2c LP |
3826 | |
3827 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3828 | Set *x; | |
3829 | ||
3830 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3831 | if (!x) { | |
3832 | char *q; | |
3833 | ||
742f41ad LP |
3834 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3835 | if (r < 0) | |
3836 | return r; | |
a57f7e2c LP |
3837 | |
3838 | q = strdup(prefix); | |
3839 | if (!q) | |
3840 | return -ENOMEM; | |
3841 | ||
d5099efc | 3842 | x = set_new(NULL); |
a57f7e2c LP |
3843 | if (!x) { |
3844 | free(q); | |
3845 | return -ENOMEM; | |
3846 | } | |
3847 | ||
3848 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3849 | if (r < 0) { | |
3850 | free(q); | |
3851 | set_free(x); | |
3852 | return r; | |
3853 | } | |
3854 | } | |
3855 | ||
3856 | r = set_put(x, u); | |
3857 | if (r < 0) | |
3858 | return r; | |
3859 | } | |
3860 | ||
3861 | return 0; | |
3862 | } | |
3863 | ||
613b411c LP |
3864 | int unit_setup_exec_runtime(Unit *u) { |
3865 | ExecRuntime **rt; | |
3866 | size_t offset; | |
3867 | Iterator i; | |
3868 | Unit *other; | |
3869 | ||
3870 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3871 | assert(offset > 0); | |
3872 | ||
06b643e7 | 3873 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3874 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3875 | if (*rt) | |
3876 | return 0; | |
3877 | ||
3878 | /* Try to get it from somebody else */ | |
3879 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3880 | ||
3881 | *rt = unit_get_exec_runtime(other); | |
3882 | if (*rt) { | |
3883 | exec_runtime_ref(*rt); | |
3884 | return 0; | |
3885 | } | |
3886 | } | |
3887 | ||
3888 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3889 | } | |
3890 | ||
29206d46 LP |
3891 | int unit_setup_dynamic_creds(Unit *u) { |
3892 | ExecContext *ec; | |
3893 | DynamicCreds *dcreds; | |
3894 | size_t offset; | |
3895 | ||
3896 | assert(u); | |
3897 | ||
3898 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
3899 | assert(offset > 0); | |
3900 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
3901 | ||
3902 | ec = unit_get_exec_context(u); | |
3903 | assert(ec); | |
3904 | ||
3905 | if (!ec->dynamic_user) | |
3906 | return 0; | |
3907 | ||
3908 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
3909 | } | |
3910 | ||
1c2e9646 LP |
3911 | bool unit_type_supported(UnitType t) { |
3912 | if (_unlikely_(t < 0)) | |
3913 | return false; | |
3914 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3915 | return false; | |
3916 | ||
3917 | if (!unit_vtable[t]->supported) | |
3918 | return true; | |
3919 | ||
3920 | return unit_vtable[t]->supported(); | |
3921 | } | |
3922 | ||
8b4305c7 LP |
3923 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3924 | int r; | |
3925 | ||
3926 | assert(u); | |
3927 | assert(where); | |
3928 | ||
3929 | r = dir_is_empty(where); | |
3930 | if (r > 0) | |
3931 | return; | |
3932 | if (r < 0) { | |
3933 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3934 | return; | |
3935 | } | |
3936 | ||
3937 | log_struct(LOG_NOTICE, | |
3938 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3939 | LOG_UNIT_ID(u), | |
3940 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3941 | "WHERE=%s", where, | |
3942 | NULL); | |
3943 | } | |
3944 | ||
3945 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3946 | int r; | |
3947 | ||
3948 | assert(u); | |
3949 | assert(where); | |
3950 | ||
3951 | r = is_symlink(where); | |
3952 | if (r < 0) { | |
3953 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3954 | return 0; | |
3955 | } | |
3956 | if (r == 0) | |
3957 | return 0; | |
3958 | ||
3959 | log_struct(LOG_ERR, | |
3960 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3961 | LOG_UNIT_ID(u), | |
3962 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3963 | "WHERE=%s", where, | |
3964 | NULL); | |
3965 | ||
3966 | return -ELOOP; | |
3967 | } | |
0f13f3bd LP |
3968 | |
3969 | bool unit_is_pristine(Unit *u) { | |
3970 | assert(u); | |
3971 | ||
7c65093a | 3972 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
3973 | * in a number of different ways. Note that to cater for unit |
3974 | * types such as slice, we are generally fine with units that | |
61233823 | 3975 | * are marked UNIT_LOADED even though nothing was |
0f13f3bd LP |
3976 | * actually loaded, as those unit types don't require a file |
3977 | * on disk to validly load. */ | |
3978 | ||
3979 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
3980 | u->fragment_path || | |
3981 | u->source_path || | |
3982 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
3983 | u->job || |
3984 | u->merged_into); | |
3985 | } | |
291d565a LP |
3986 | |
3987 | pid_t unit_control_pid(Unit *u) { | |
3988 | assert(u); | |
3989 | ||
3990 | if (UNIT_VTABLE(u)->control_pid) | |
3991 | return UNIT_VTABLE(u)->control_pid(u); | |
3992 | ||
3993 | return 0; | |
3994 | } | |
3995 | ||
3996 | pid_t unit_main_pid(Unit *u) { | |
3997 | assert(u); | |
3998 | ||
3999 | if (UNIT_VTABLE(u)->main_pid) | |
4000 | return UNIT_VTABLE(u)->main_pid(u); | |
4001 | ||
4002 | return 0; | |
4003 | } | |
00d9ef85 LP |
4004 | |
4005 | static void unit_unref_uid_internal( | |
4006 | Unit *u, | |
4007 | uid_t *ref_uid, | |
4008 | bool destroy_now, | |
4009 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4010 | ||
4011 | assert(u); | |
4012 | assert(ref_uid); | |
4013 | assert(_manager_unref_uid); | |
4014 | ||
4015 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4016 | * gid_t are actually the same time, with the same validity rules. | |
4017 | * | |
4018 | * Drops a reference to UID/GID from a unit. */ | |
4019 | ||
4020 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4021 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4022 | ||
4023 | if (!uid_is_valid(*ref_uid)) | |
4024 | return; | |
4025 | ||
4026 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4027 | *ref_uid = UID_INVALID; | |
4028 | } | |
4029 | ||
4030 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4031 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4032 | } | |
4033 | ||
4034 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4035 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4036 | } | |
4037 | ||
4038 | static int unit_ref_uid_internal( | |
4039 | Unit *u, | |
4040 | uid_t *ref_uid, | |
4041 | uid_t uid, | |
4042 | bool clean_ipc, | |
4043 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4044 | ||
4045 | int r; | |
4046 | ||
4047 | assert(u); | |
4048 | assert(ref_uid); | |
4049 | assert(uid_is_valid(uid)); | |
4050 | assert(_manager_ref_uid); | |
4051 | ||
4052 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4053 | * are actually the same type, and have the same validity rules. | |
4054 | * | |
4055 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4056 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4057 | * drops to zero. */ | |
4058 | ||
4059 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4060 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4061 | ||
4062 | if (*ref_uid == uid) | |
4063 | return 0; | |
4064 | ||
4065 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4066 | return -EBUSY; | |
4067 | ||
4068 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4069 | if (r < 0) | |
4070 | return r; | |
4071 | ||
4072 | *ref_uid = uid; | |
4073 | return 1; | |
4074 | } | |
4075 | ||
4076 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4077 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4078 | } | |
4079 | ||
4080 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4081 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4082 | } | |
4083 | ||
4084 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4085 | int r = 0, q = 0; | |
4086 | ||
4087 | assert(u); | |
4088 | ||
4089 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4090 | ||
4091 | if (uid_is_valid(uid)) { | |
4092 | r = unit_ref_uid(u, uid, clean_ipc); | |
4093 | if (r < 0) | |
4094 | return r; | |
4095 | } | |
4096 | ||
4097 | if (gid_is_valid(gid)) { | |
4098 | q = unit_ref_gid(u, gid, clean_ipc); | |
4099 | if (q < 0) { | |
4100 | if (r > 0) | |
4101 | unit_unref_uid(u, false); | |
4102 | ||
4103 | return q; | |
4104 | } | |
4105 | } | |
4106 | ||
4107 | return r > 0 || q > 0; | |
4108 | } | |
4109 | ||
4110 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4111 | ExecContext *c; | |
4112 | int r; | |
4113 | ||
4114 | assert(u); | |
4115 | ||
4116 | c = unit_get_exec_context(u); | |
4117 | ||
4118 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4119 | if (r < 0) | |
4120 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4121 | ||
4122 | return r; | |
4123 | } | |
4124 | ||
4125 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4126 | assert(u); | |
4127 | ||
4128 | unit_unref_uid(u, destroy_now); | |
4129 | unit_unref_gid(u, destroy_now); | |
4130 | } | |
4131 | ||
4132 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4133 | int r; | |
4134 | ||
4135 | assert(u); | |
4136 | ||
4137 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4138 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4139 | * objects when no service references the UID/GID anymore. */ | |
4140 | ||
4141 | r = unit_ref_uid_gid(u, uid, gid); | |
4142 | if (r > 0) | |
4143 | bus_unit_send_change_signal(u); | |
4144 | } |